What law BEST explains why an organism with ‘Ttʼ will show only the dominant phenotype?

If an organism inherits one dominant allele and one recessive allele for eye color, their genotype would be:

Two parents have the genotype Gg for a genetic disorder caused by a recessive allele. What is the chance that any of their children will inherit the disorder?

Which Mendelian law of inheritance states that organisms inherit two copies of each gene and donate one copy to each of their offspring?

In pigs, the allele for a wavy, rough coat (R) is dominant to the allele for a soft, fine coat (r). A rough coat boar and a soft coat sow mate. They produce several litters, 50% are rough coat and 50% are smooth coat. What must be the genotypes of the

parents to create this phenotypic ratio?

Imagine two heterozygous parents. Each has a dominant allele (B) for brown eyes and a recessive allele (b) for blue eyes. What would the genotypic ratio of the offspring be?

Identify the following genotypes as homozygous or heterozygous.

TT: _____

Tt: _____

tt: _____

If square is dominant over round, what are the phenotypes for the following genotypes?

SS: ______

Ss: ______

ss: ______

The American Curl is a breed of cat that has curly ears. The allele for the curly ears is dominant (E). Suppose a cat with the heterozygous genotype is bred to a female cat with the homozygous recessive genotype.

Which punnett square below shows the correct genotype cross with the correct possible offspring?

The American Curl is a breed of cat that has curly ears. The allele for the curly ears is dominant (E). Suppose a cat with the heterozygous genotype is bred to a female cat with the homozygous recessive genotype.

What is the phenotypic ratio of the offspring?

The American Curl is a breed of cat that has curly ears. The allele for the curly ears is dominant (E). Suppose a cat with the heterozygous genotype is bred to a female cat with the homozygous recessive genotype.

If the cross produces six kittens, how many of them will have curly ears?

In humans, a widowʼs peak is dominant to a straight hairline, and freckles are dominant to no freckles. Two parents that are heterozygous for both traits have children. Use H for hair, and F for freckles.

Which are the correct genotypes for the parents?

In humans, a widowʼs peak is dominant to a straight hairline, and freckles are dominant to no freckles. Two parents that are heterozygous for both traits have children. Use H for hair and F for freckles.

What is the phenotype ratio of the possible offspring?

For an XX female to express a recessive sex-linked trait, she must have ________________.

Human height occurs in a continuous range because it is affected by the interaction of many genes, making it a(n)...

Red hair and freckles are commonly inherited together. Which of following patterns of inheritance explains this?

Which pair of genes in the diagram would be most likely to be inherited together?

In a newly discovered species of flower, it was discovered that the color of the flowers is determined by two different genes. Which of the following inheritance patterns is this?

A man with Type A blood marries a woman with Type AB blood. Based on what you know about blood types, what is the only blood type NOT possible in any of their children?

A cross between a purebred animal with red hairs and a purebred animal with white hairs produces all animals with BOTH red and white hairs is what type of inheritance pattern?

In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the females possess the trait is an example of what type of inheritance pattern?

A cross between a white horse and a chestnut (dark brown) horse produces all light brown horses is an example of what type of inheritance pattern?

A cross between a tall sunflower and a short sunflower results in sunflowers with a range in heights is an example of what type of inheritance pattern?

A man who is normal for color vision marries a woman who is colorblind (Remember, color-blindness is a sex-linked trait!) What is the probability of a having a colorblind male?

Mutations can be caused by all of the following EXCEPT ___________________.

In order for a mutation to be passed on from parent to offspring, the mutation must occur in_____.

On a pedigree, how would a female individual with a disease be notated?

If a mutation only changes the nucleotide sequence for a single protein, then it is known as a _______

What kind of mutation occurred in the sex chromosome of an individual with the genotype XXY?

How would you categorize a genetic disorder that is equally likely in males and females and is caused by the presence of two affected alleles?

Nondisjunction of autosomal chromosomes, such as chromosome number 21, can result in disorders like...

When getting an X-ray taken at the doctorʼs office, you notice the technician cover you with a heavy vest. This vest, you are told, contains lead, a metal that can block X-rays, which are a form of radiation. The technician covers your torso, and folds the vest over double across your reproductive organs (testes/ovaries). This is done because radiation can damage the DNA of

theses organs, causing a mutation you may pass to children. Substances like radiation and other certain chemicals are known as mutagens because...

Which BEST explains the difference between a gene mutation and a chromosome mutation?

Which of the following is an example of a GENE MUTATION?

Which of the following is an example of a CHROMOSOME MUTATION?

A DNA segment in a somatic cell undergoes the mutation pictured, what is the name of this type of mutation?

A DNA segment in a somatic cell undergoes the mutation pictured, is this a gene mutation, chromosome mutation, or neither?

Consider the pedigree pictured, What type of inheritance is displayed?

Consider the pedigree pictured, What is the genotype of the first individual in generation II?

Consider the pedigree pictured, What is the genotype of the grandmother (the oldest female) in this family?

The form of a gene that is always expressed if present is the _____________ form.