Exam 9: Patterns of Inheritance

Justin has type A blood and his wife Brittany has type B blood. Justin's parents both have type AB blood, and Brittany's parents also both have type AB blood. What are the chances that Justin and Brittany's son Theodore has type A blood?

Cats normally have a total of 18 toes, 5 on each front paw and 4 on each back paw. But some cats express the dominant phenotype for polydactyly, which results in the development of extra toes on one or more paws. Jake, a Canadian tabby cat, has 28 toes and is recognized by the Guinness Book of World Records as the cat with the most toes. Suppose that Jake mates with a female cat, Lucy, who has 18 total toes. Over several years, they have multiple litters and a total of 16 kittens (10 males and 6 females). The total number of toes on each kitten ranges from 21 to 25. -One of Jake and Lucy's kittens mates with another cat that has 18 total toes. What is the probability that one of their offspring would have 18 total toes?

Below are two statements. Which (if any) applies to the law of segregation? Which (if any) applies to the law of independent assortment? I: Phenotypes for long tails and big eyes are inherited separately in lab mice. II: A baby mouse inherits a maternal red-eye allele and a paternal black-eye allele.

Any gene located on a sex chromosome

If independent assortment did not occur, which of the following would be true?

Which of the following statements regarding genotypes and phenotypes is false?

What is the most likely explanation for the occurrence of an X-linked genetic disorder in the boy at the bottom of the pedigree shown?

A testcross is

In some cats, black coat color (B) is dominant over brown (b) and a striped fur pattern (S) is dominant over a marbled fur pattern (s). You rescued a black striped cat from an animal shelter but could not determine its exact genotype. To do so, you mated the cat with a brown marbled cat. The mating produced 3 brown marbled, 2 brown striped, 2 black marbled, and 3 black striped. Immediately, you concluded the genotype of your rescued cat was

According to this figure, heterozygotes for this form of hypercholesterolemia suffer from the disease because they

Which of the following terms refers to a situation where a single phenotypic character is determined by the additive effects of two or more genes?

Mendel conducted his most memorable experiments on

If A is dominant to a and B is dominant to b, what is the expected phenotypic ratio of the cross AaBb × AaBb?

The presence of AB blood type illustrates the principle of

The chromosome theory of inheritance states that

Cats normally have a total of 18 toes, 5 on each front paw and 4 on each back paw. But some cats express the dominant phenotype for polydactyly, which results in the development of extra toes on one or more paws. Jake, a Canadian tabby cat, has 28 toes and is recognized by the Guinness Book of World Records as the cat with the most toes. Suppose that Jake mates with a female cat, Lucy, who has 18 total toes. Over several years, they have multiple litters and a total of 16 kittens (10 males and 6 females). The total number of toes on each kitten ranges from 21 to 25. -If we use the letter P to represent the polydactyly gene, what is Jake's genotype?

You prepare a human karyotype. Upon analysis, you find 22 pairs of chromosomes that are each of approximately equal length and also a single pair that has one chromosome longer than the other. What can you conclude from this information?

Most genetic disorders of humans are caused by

You are looking at an unknown cell under a microscope that has 22 chromosomes plus 2 X chromosomes. Which of the following is the most likely identity of this cell?

The phenotypic ratio resulting from a dihybrid cross of two heterozygote individuals showing independent assortment is expected to be