Exam 9: Patterns of Inheritance

Dr. Smith's parents have normal hearing. However, Dr. Smith has an inherited form of deafness. Deafness is a recessive trait that is associated with the abnormal allele d. The normal allele at this locus, associated with normal hearing, is D. Dr. Smith's parents could have which of the following genotypes?

Mendel's law of independent assortment states that

Most genetic disorders of humans are caused by

In giraffes, long necks (N), long legs (L), dark spots (D), and the ability to digest meat (M)are all dominant traits. What possible genotype could a long-necked, short-legged, light-spotted, meat-digesting giraffe have?

Recessive X-linked traits are more likely to be expressed in a male fruit fly than a female fruit fly because

After reading the paragraphs below, answer the questions that follow. 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. -If we use the letter P to represent the polydactyly gene, what is Jake's genotype?

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

What is the normal complement of sex chromosomes in a human male?

You conduct a dihybrid cross. A ________ ratio would make you suspect that the genes are linked.

A carrier of a genetic disorder who does not show symptoms is most likely to be ________ to transmit it to offspring.

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?

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

Imagine that we mate two black Labrador dogs with normal vision and find that three of the puppies are like the parents, but one puppy is chocolate with normal vision and another is black with PRA (progressive retinal atrophy, a serious disease of vision). We can conclude that

According to scientists, about what percentage of men currently living in Central Asia may be descended from the Mongolian ruler Genghis Khan?

A monohybrid cross is

The individual features of all organisms are the result of

Suppose that an elephant with the genotype EEFfggHh reproduces with an elephant with the genotype eeFFGgHh. What is the probability that a baby elephant (called a calf)would have the genotype EeFFGghh?

Which of the following kinds of data could be used to map the relative position of three genes on a chromosome?

How is sex determined in most ants and bees?

Assuming that the probability of having a female child is 50% and the probability of having a male child is also 50%, what is the probability that a couple's first-born child will be female and that their second-born child will be male?