WorksheetsUnit 5: Inheritance Review
Total questions: 27
Worksheet time: 14mins
Which cell process is represented by the diagram above?
meiosis
mitosis
respiration
fertilization
If a somatic cell that normally has 50 chromosomes undergoes mitosis and cytokinesis, which of the following is produced?
2 cells 50 chromosomes each
2 cells 25 each
4 cells 50 each
4 cells 25 each
If a germ cell that normally has 50 chromosomes undergoes meiosis and cytokinesis, which of the following is produced?
2 cells 50 each
2 cells 25 each
4 cells 50 each
4 cells 25 each
Why is crossing over important??
it maintains the number of chromosomes
it ensures identical cells
it creates multiple alleles
it creates genetic variation
What is the most likely mode of inheritance for the trait depicted in the pedigree chart shown above?
autosomal dominant
autosomal recessive
x-linked dominant
x-linked recessive
What is the most likely mode of inheritance for the trait depicted in the pedigree chart shown above?
autosomal dominant
autosomal recessive
x recessive
x dominant
Which of the following most likely describes the individual indicated with the arrow?
heterozygous male
heterozygous female
homozygous male
homozygous female
A non-human germ cell contains 80 chromosomes. Which of the following best describes the cells created from this germ cell after the completion of Meiosis I and cytokinesis?
2 haploid cells with bivalent chromosomes (consist of two chromatids each)
2 haploid cells with chromosomes which consist of a single chromatid.
4 diploid cells with chromosomes which consist of a single chromatid.
4 haploid cells with bivalent chromosomes (consist of two chromatids each)
A kangaroo’s somatic cells normally have 12 chromosomes. How many pairs of sister chromatids do the kangaroo’s somatic cells have during metaphase?12
247
36
12
6
A kangaroo’s somatic cells normally have 12 chromosomes. How many chromosomes are present in the kangaroo’s somatic cells by the end of anaphase?
12
24
36
6
A kangaroo’s somatic cells normally have 12 chromosomes. How many chromosomes are present in each of the kangaroo’s somatic cells after mitosis and cytokinesis?
12
24
36
6
A father with curly hair and a mother with straight hair produce children with wavy hair. One of these children eventually produced his own children with a curly haired partner. Half of the resulting children had curly hair and half had wavy hair. What is the best explanation for this pattern of inheritance?
A. The alleles for curly hair and straight hair are codominant.
B. The trait is an X-linked recessive trait.
C. The alleles for curly hair and straight hair are incompletely dominant.
A female shark, which never had any contact with a male, gave birth to a viable offspring. Which process likely created this offspring?
sexual reproduction
self fertilization
parthenogenesis
cloning
One strand of a DNA molecule has the sequence 5’ATT GGG CTT AAA 3’. What is the sequence of the strand complementary to this strand?
5’TAA CCC GAA UUU 3’
3'TAA CCC GAA TTT 5'
3’ATT GGG CTT AAA 5’
5’ATT GGG CTT AAA 3’
Red-green colorblindness is much more common in males than in females. The colorblind males inherit the trait from an unaffected mother. Which of the following best describes the inheritance pattern of the trait?
Red-green colorblindness is a y-linked trait
Red-green colorblindness is polygenic trait.
Red-green colorblindness is an X-linked recessive trait.
Red-green colorblindness results from codominant alleles.
Which best describes human chromosomes?
A. A circular strand of DNA which contains 5-10 genes.
B. A linear molecule consisting of two strands of DNA running in opposite directions. Each chromosome contains hundreds of genes.
C. A circular molecule consisting of two strands of DNA running in opposite directions. Each chromosome contains 5-10 genes.
D. A conglomeration of DNA, mRNA, tRNA, and proteins which contains 10-20 genes.
Which best describes the difference between mitosis and meiosis?
A. Mitosis creates reproductive cells, while meiosis creates somatic cells.
B. Mitosis occurs only in the gonads, while meiosis happens throughout the body.
C. Mitotic division consists of DNA replication followed by one nuclear division and one round of cytokinesis, while meiotic division consists of DNA replication followed by two nuclear divisions and two rounds of cytokinesis.
D. Mitosis produces 4 genetically unique cells, while meiosis produces two cells which are genetically identical to each other and the original mother cell.
In pea plants the allele for purple flowers (P) is dominant over the allele for white flowers (p). Two heterozygous purple-flowered plants are crossed? What is the probability that the cross will produce a white-flowered offspring?
1/2
1/4
1/16
1/8
In pea plants the allele for purple flowers (P) is dominant over the allele for white flowers (p). Two heterozygous purple-flowered plants are crossed. What is the probability that the cross will produce a heterozygous purple-flowered offspring?
1/2
1/4
1/8
1/16
Hemophilia is an X-linked recessive trait. If a female carrier for hemophilia has children with an unaffected male, what are the chances that they produce a child who has hemophilia?
1/2
1/4
1/8
0
In rabbits, albinism (b) is recessive to normal brown coloration (B). When an albino female was crossed with a brown male, they produced 2 brown offspring and 2 albino offspring. What was the genotype of the male parent?
bb
Bb
BB
could be any of them
A normal human somatic cell contains 46 chromosomes, how many of these chromosomes are classified as autosomes?
46
23
44
2
Which of the following terms identifies pairs of chromosomes which contain the same genes in the same order?
phenotypic
homologous
diploid
segregated
What is the probability that the cross between the following genotypes: Aa BB X Aa Bb will produce an offspring with the genotype aa BB?
1/2
1/4
1/8
0
Which best describes a single gene?
A section of DNA which codes for a specific carbohydrate. Each gene is continuously transcribed and translated to produce an abundant supply of the appropriate carbohydrate.
A section of DNA which codes for a specific protein. The transcription and translation of the gene only occurs at certain times within the cell’s life.
A section of either DNA, mRNA, rRNA, or tRNA which codes for multiple proteins throughout the body.
A section of DNA or protein which controls the expression of traits by regulating the movement of ribosomes throughout the cytoplasm.
Assume that a particular genetic condition in a mammalian species causes an inability to digest starch. This disorder occurs with equal frequency in males and females. In most cases, neither parent of the affected offspring has the condition. Describe the most probable pattern of inheritance for this condition. Explain your reasoning. Include in your discussion a sample cross(es) sufficient to verify your proposed pattern.
The trait is most likely an autosomal dominant trait. This seems to be true because males and females are affected with an equal frequency and because unaffected parents(carriers) can pass the trait to their children. Affected individuals must inherit an allele for the trait from both parents.
The trait is most likely an autosomal recessive trait. This seems to be true because males and females are affected with an equal frequency and because unaffected parents(carriers) can pass the trait to their children. Affected individuals must inherit an allele for the trait from both parents.
The trait is most likely an x-linked recessive trait. This seems to be true because males and females are affected with an equal frequency and because unaffected parents(carriers) can pass the trait to their children. Affected individuals must inherit an allele for the trait from both parents.
The trait is most likely an x-linked dominant trait. This seems to be true because males and females are affected with an equal frequency and because unaffected parents(carriers) can pass the trait to their children. Affected individuals must inherit an allele for the trait from both parents.
Meiosis is an important step in the process of sexual reproduction.
A. Describe at least two processes that occur during meiosis which help to create genetic diversity in sex cells.
B. Several human disorders occur as a result of defects in the meiotic process. Identify ONE such disorder and the effects the disorder has on the phenotype of affected individuals. Also include a description of how this abnormality could result from a defect in meiosis.
Which best answers both A and B
A.) Crossing-over occurs during prophase 1 of meiosis. This process recombines the DNA from paternal and maternal chromosomes to create unique chromosomes that can be passed to offspring.
Independent assortment occurs in metaphase 1 of meiosis and ensures that allele pairs separate independently during gamete formation and end up in different gametes.
B.) Down's syndrome causes round face, mental retardation and an assortment of internal deformities. During anaphase 1 or 2 of meiosis, the chromosomes didn't separate correctly. Some gametes ended up with extra and others had ones missing. If the extra was 21 and combines with a normal gamete the resulting zygote will have 3 chromosome 21 copies and will develop Down's syndrome. Other examples include but are not limited to: Klinefelter's, Turner's and Jacob's Syndrome.
A.) Crossing-over occurs during prophase 1 of meiosis. This process recombines the DNA from paternal and maternal chromosomes to create unique chromosomes that can be passed to offspring.
Independent assortment occurs in metaphase 1 of meiosis and ensures that allele pairs separate independently during gamete formation and end up in different gametes.
B.) Down's syndrome causes round face, mental retardation and an assortment of internal deformities. During anaphase 1 or 2 of meiosis, the chromosomes didn't separate correctly. Some gametes ended up with extra and others had ones missing. If the extra was 21 and combines with a normal gamete the resulting zygote will have 3 chromosome 21 copies and will develop Down's syndrome. Other examples include but are not limited to: Klinefelter's, Turner's and Jacob's Syndrome.
