The hair form gene shows incomplete dominance. Straight hair (SS) is dominant, curly hair (CC) is recessive, and wavy hair (SC) is heterozygous. Mr. and Mrs. Anderson both have wavy hair (SC). What percentage of their children will also have wavy hair (SC)?

Codominance occurs in calico cats, which allows for the Black and Tan colors to show. What percentage of the offspring will be calico (black and tan spotted)?

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).

Cross a red flower with a speckled flower. What is the phenotypic ratio?

When one allele is not dominant over another, resulting in a blended phenotype for heterozygous offspring is considered....

The chart shown indicates a method of representing traits in pea plants. Some offspring of a cross in pea plants were tall and green. According to the chart, these plants could be represented by

In order for a female to have a sex-linked disorder, the following must be true.

Base your answer to the following question on the pedigree chart below, which shows a history of ear lobe shape, and on your knowledge of biology. The genotype of individual 2 could be

Base your answer to the following question on the pedigree chart below, which shows a history of ear lobe shape, and on your knowledge of biology. The genotype of individual 1 could be

Base your answer to the following question on the information and diagram below and on your knowledge of biology. Yellow male offspring are represented by

What happens when a baby inherits just a Y chromosome (no X chromosome).

Based on the Karyotype shown, at which chromosome can we identify a genetic disorder?

Chromosome pairs 1-22 are referred to as

Which letter(s) in the diagram correspond to cells that are haploid?

When does independent assortment occur?

Which of the following are true of meiosis? Select all that apply!

How many chromosomes are normally found in human body cells?

What type of reaction is this?

C₆H₁₂O6 + 6O₂ → 6CO₂ + 6H₂O + 32 ATP

The reaction shown below is performed by baker's yeast (S. cerevisiae). Which of the following is true about this reaction?

C₆H₁₂O₆ --> 2C₂H₅OH + 2 CO₂ + 2ATP

Glucose --> Ethanol

Mendel crossed yellow-seeded and green-seeded pea plants and then allowed the offspring to self-pollinate to produce an F2 generation. The results were as follows: 6,022 yellow and 2,001 green (8,023 total). Which of the following statements correctly describes the relationship of the allele for green seeds to the allele for yellow seeds?

Use the following description and the Punnett square to answer. In a plant where allele D produces dark leaves and dd produces light leaves, a true-breeding dark-leaved plant crossed with a light-leaved plant yields F1 plants that self-pollinate, producing an F2 shown in a Punnett square with boxes labeled 1, 2, 3, and 4. Which of the boxes marked 1-4 correspond to plants that will be true-breeding?

Use the following description and the Punnett square to answer. In a plant where gene locus D controls leaf color, D produces dark green leaves and dd produces light green leaves. A true-breeding dark-leaved plant crossed with a light-leaved plant yields F1 plants that self-pollinate, producing an F2 shown in a Punnett square with boxes labeled 1, 2, 3, and 4 for the genotypes. Which of the boxes marked 1-4 correspond to plants with a heterozygous genotype?

Use the following description and the Punnett square to answer. In a particular plant, leaf color is controlled by gene locus D. Plants with at least one allele D have dark green leaves, and plants with the homozygous recessive dd genotype have light green leaves. A true-breeding, dark-leaved plant is crossed with a light-leaved one, and the F1 offspring is allowed to self-pollinate. The predicted outcome of the F2 is diagrammed in a Punnett square in which the four boxes are labeled 1, 2, 3, and 4 to represent the genotypes produced. Which of the boxes marked 1-4 correspond to plants with dark leaves?

Mendel continued some of his experiments into the F2 or F3 generation in order to:

What was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants?

In fruit flies, grey body color is dominant over black body color, and long wings are dominant over short wings (G = grey body color allele, g = black body color allele; L = long wing allele, l = short wing allele). You perform a cross with two parental flies, each of which has a grey body color and long wings. You obtain the following results when you analyze the phenotypes of the offspring: 18 with grey bodies and long wings, 6 with black bodies and long wings, 6 with grey bodies and short wings, and 2 with black bodies and short wings. Based on this information, what are parental genotypes?

Tay-Sachs disease is a fatal genetic disorder caused by a mutation in an autosomal gene coding for a lysosomal enzyme. A couple, neither of whom suffer from the disorder, have three children; one child was diagnosed with Tay-Sachs at birth, while the other two have normal phenotypes. Determine the genotypes of the parents and indicate the pattern of inheritance displayed by the disorder (T = dominant allele, t = recessive allele).

In the bobcat pedigree where long claws are dominant (B) and short claws are recessive (b), what is the genotype of individual II-5?

In the bobcat pedigree where long claws are dominant (B) and short claws are recessive (b), what is the genotype of individual II-3?

In the bobcat pedigree where long claws are dominant (B) and short claws are recessive (b), what is the genotype of individual I-4?

In the bobcat pedigree where long claws are dominant (B) and short claws are recessive (b), which of the following represents an individual male bobcat with short claws?

A pedigree for a bobcat population indicates the occurrence of long claws, a trait controlled by a single autosomal gene with two alleles (B = dominant allele, produces long claws; b = recessive allele, produces short claws). Which of the following represents an individual female bobcat with long claws in the pedigree?

Your class obtains three corn cobs and counts the number of purple and yellow kernels on each cob as summarized:

If corn kernel color is controlled by a single gene with two alleles (R = dominant purple, r = recessive yellow), which parental cross could have produced these cobs as offspring?

The pedigree shows the inheritance of a human biochemical disorder called alkaptonuria in which affected individuals accumulate a dark-colored substance (alkapton) in urine and certain tissues. Shaded symbols indicate affected individuals. Based on the pedigree, what is the most likely inheritance pattern for alkaptonuria?

Down syndrome results from an extra copy of which chromosome?

The failure of chromosomes to separate properly during cell division is called what?

The SRY gene is best described by which of the following?

A human male will inherit which of the following from his mother?

Hemophilia A is an X-linked recessive trait. A woman is a carrier for hemophilia A, and her husband is a hemophiliac. What is the chance that the daughter they plan to have will be a carrier?

Hemophilia A is an X-linked recessive trait. A woman is a carrier for hemophilia A, and her husband is a hemophiliac. What is the chance that the son they plan to have will be a hemophiliac?

Hemophilia A is an X-linked recessive trait. A woman is a carrier for hemophilia A, and her husband is a hemophiliac. Assume N is the dominant allele and n is the recessive allele. What are the genotypes of the mother and the father, respectively?

Use the following information: A woman who has type A blood has a daughter who is type O and a son who is type B. Which of the following is a possible genotype/phenotype for the father of the two children?

Use the following information: A woman who has type A blood has a daughter who is type O and a son who is type B. Which of the following is the only possible genotype for the mother?

Use the following information: A woman who has type A blood has a daughter who is type O and a son who is type B. Which of the following is the only possible genotype for the son?

A human egg cell containing 22 autosomes but no sex chromosomes (O) is fertilized by a human sperm cell containing 22 autosomes and an X chromosome. The resulting zygote will

Use the following information: In pea plants, the yellow seed color allele (Y) is dominant over the green seed color allele (y). You have a pea plant of unknown genotype that produces yellow seeds and perform a test cross to determine the genotype of this plant. Which set of results from the test cross would indicate that the pea plant with unknown genotype is heterozygous (Yy)?

Use the following information: Huntington's disease is caused by a dominant allele (H). Jane is heterozygous for the Huntington's allele. Jane wants to have a child with Jack. Jack is homozygous recessive for the gene in question. What are the chances they will have a child with Huntington's disease?

Use the following information: Huntington's disease is caused by a dominant allele (H). Jane is heterozygous for the Huntington's allele. What is Jane's phenotype?

Use the following information: Huntington's disease is caused by a dominant allele (H). Jane is heterozygous for the Huntington's allele. What is Jane's genotype?

Eye color, skin color, and height in humans are controlled by multiple genes. These traits demonstrate which of the following?

Use the following information: As a genetic counselor, you meet with Sam and Dianne, who have both tested positive as carriers for the recessive allele (p) that causes phenylketonuria (PKU). What is the chance that their first child will not be affected by PKU?

Use the following information: As a genetic counselor, you meet with Sam and Dianne, who have both tested positive as carriers for the recessive allele (p) that causes phenylketonuria (PKU). What is the chance that their first child will have PKU?

Use the following information: As a genetic counselor, you meet with Sam and Dianne, who have both tested positive as carriers for the recessive allele (p) that causes phenylketonuria (PKU). What are the genotypes of the parents who have come into your office?

Eye color, skin color, and height in humans are controlled by multiple genes. These traits demonstrate which of the following?

A species of daylily can have either yellow or red flowers. If we cross a homozygous yellow flower plant with a homozygous red flower plant, all of the offspring have red flowers. Based on that result, which of the following is true?

Down syndrome results from an extra copy of which chromosome?

Which of the following statements is correct in describing the terms monohybrid cross and dihybrid cross?

What was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants?

Which of the following inheritance patterns describes the ability of a single allele to have multiple phenotypic effects?

Which of the following phenotypes is an example of polygenic inheritance?

Which of the following statements correctly describes how Mendel accounted for the observation that traits had disappeared in the F₁ generation and then reappeared in the F₂ generation?

When Mendel set up a Parental (P) cross between true breeding purple and white flowered plants to generate the F₁ and then allowed the F₁ to self-pollinate to generate the F₂ he saw a dominant to recessive ratio of 3:1. What phenotypic ratio would be expected if he crossed the F₁ with the original purple parent?

Why did all of the F1 offspring of Mendel's purple and white flowered pea cross always look like one of the two parental varieties?

Albinism is a recessive trait where an individual does not produce the pigment melanin. A man and woman both produce melanin, but both have one parent with albinism. What is the probability that their first child will have albinism?

Albinism is a recessive trait where an individual does not produce the pigment melanin. A man and woman who both produce melanin have one child out of three who has albinism. What are the genotypes of the man and woman?

In a particular plant, green (G) seed color is dominant to blue (g). If two plants with green seeds were crossed and resulted in 302 green and 98 blue seed plants, what was the most probable genotype of each parent?

Pea plants produce either purple or white flowers with purple showing complete dominance. A gardener was given plants with purple flowers. Which of the following types of crosses would best allow her to determine the genotype of her plant in one generation?

In pea plants, the tall phenotype is dominant to the dwarf phenotype. If a heterozygous pea plant is crossed with a homozygous tall pea plant, what is the probability that the offspring will be dwarf in size?

Ten plants of the same genotype are planted in a large flower garden. Later that year, some of the ten plants have blue flowers and others have pink flowers. This can be best explained by which of the following statements?

Radish flowers may be red, purple, or white. A cross between a red-flowered plant and a white-flowered plant yields all-purple offspring. The flower color trait in radishes is an example of which of the following inheritance patterns?

Marfan syndrome in humans is caused by an abnormality of the connective tissue protein fibrillin. Patients are usually very tall and thin, with long spindly fingers, curvature of the spine, sometimes weakened arterial walls, and sometimes eye problems, such as lens dislocation. Which of the following would you conclude about Marfan syndrome from this information?

The following question refers to the figure of a family's pedigree chart, some of whose members exhibit the dominant trait, W. Affected individuals are indicated by a dark square or circle.

What is the genotype of individual II-5?

The following question refers to the figure of a family's pedigree chart, some of whose members exhibit the dominant trait, W. Affected individuals are indicated by a dark square or circle.

What is the likelihood that a future child of IV-3 and IV-4 will have the trait?

The following question refers to the figure of a family's pedigree chart, some of whose members exhibit the dominant trait, W. Affected individuals are indicated by a dark square or circle.

What is the genotype of individual II-5?

The following question refers to the figure of a family's pedigree chart, some of whose members exhibit the dominant trait, W. Affected individuals are indicated by a dark square or circle.

What is the probability that individual III-1 is Ww?

Which of the following statements about the law of independent assortment is correct?

Which of the following statements about the law of segregation is correct?

Male sex determination in mammals is in large part due to the SRY gene found on the Y chromosome. Which of the following scenarios will result in a person with an XX karyotype developing a male phenotype?

Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human X chromosome. The patients' muscles weaken over time because they have a lack or decreased levels of dystrophin, a muscle protein. Which of the following correctly predicts the probability of muscular dystrophy in female children?

Which of the following individuals will inherit an X-linked allele from a male parent who carries the allele (X^hY)?

Which of the following statements correctly describes the chromosome theory of inheritance as it was understood in the early 20th century?

Males are more often affected by X-linked traits than are females because ________.

The chromosomal alteration that results from a chromosome fragment joined to a non-homologous chromosome is called a ________.

A couple has a child with Down syndrome. Which of the following is the most probable cause of the child's condition?

A patient has 47 chromosomes, including three X chromosomes. Which of the following statements describes her expected phenotype?

Which of the following is an example of monosomy in humans?

Red-green color blindness is an X-linked recessive trait in humans. Two people with normal color vision have a son with colorblindness. Given this information, the genotypes of the parents are ________.

Cinnabar eye color is an X-linked, recessive characteristic in fruit flies. If a female having cinnabar eyes is crossed with a male having wild-type, red eyes, what percent of the F1 males will have cinnabar eyes?

Widow's peak is dominant to no widow's peak. Determine the genotype and phenotype ratios for a homozygous dominant female and a homozygous recessive male.

Brown eyes are dominant to blue eyes. Determine the genotype and phenotype ratios for a homozygous dominant female and a homozygous dominant male.

Cleft chin is dominant to no cleft chin. Determine the genotype and phenotype ratios for a heterozygous female and a heterozygous male.

In a complete dominance cross between a white, terminal (recessive) and red, axial (dominant) flower, what is the probability of a red, axial offspring?

In a dihybrid cross of complete dominance, what is the phenotypic ratio?

In a monohybrid cross of incomplete dominance, what is the phenotypic ratio?

In a monohybrid cross of complete dominance, what is the phenotypic ratio?

In a dihybrid cross of complete dominance, what is the phenotypic ratio?

Identify which of the following descriptions about dominance are correct

This process involves homologous chromatids exchanging genetic material to increase genetic diversity.

Which of the following best describes the inheritance pattern of the shown pedigree?

Describe the process of nondisjunction.

Describe why a male is more likely to be affected by a sex-linked trait?

What is an example of a codominant trait in the human body?

Can a human male be a carrier of red-green color blindness?

This type if chromosome mutation happens when a part of the chromosome breaks off and that segment flips around backwards and reattaches itself.

Part of a chromosome is repeated

Part of a chromosome is reversed.

Part of one chromosome is transported and attached

to a non-homologous chromosome

This type of chromosomal mutation produces an extra copy of all or part of the chromosome:

If part of the chromosome is turned around in the opposite direction this is called:

This is called Turners syndrome, can you notice the mutation in the chromosomes?

These are the chromosomes of someone with Kleinfelters syndrome. What is different about their chromosomes?

Notice the abnormal 23rd chromosome. This individual has an extra X chromosome. What type of mutation is this?

There are two alleles for the single gene which controls the shape of a species of radish: long and round (spherical). If we cross a homozygous long radish with a homozygous round radish, all of the baby radishes are oval. Based on that result, which of the following is true?

Use the following information: In pea plants, the yellow seed color allele (Y) is dominant over the green seed color allele (y). You have a pea plant of unknown genotype that produces yellow seeds. You want to perform a test cross to determine the genotype of this plant. In the scenario above, you are test-crossing your plant of unknown genotype to a plant that has what genotype and phenotype?

Which of the following does NOT support the concept of common ancestry for all organisms?

Describe the process of nondisjunction.

What is codominance?

What is incomplete dominance?

What is a gene loci

This is an example of

a point mutation or substitution of UAU to UAA results in the translation from

If Crossing over is a tool for generating variation in the population, then what is the purpose of the S phase in the cell cycle

An individual has three number 21 chromosomes. Which is most likely the cause?

Which sex chromosomes would indicate a human male that did NOT go through nondisjunction?

Which of the following would be considered a Gamete cell?

Chromosome mutation involving loss of a piece of chromosome.

Chromosome mutation involving the repeat of a piece of chromosome.