Exam 10: Patterns of Inheritance

Albinism results from a recessive allele. Which of the following describes the expected offspring from a normally pigmented male with an albino father and an albino wife?

Based on this pedigree, which individual was a carrier for hemophilia but did not suffer from the disease?

Sex-linked traits affect only sexual characteristics. True or False?

Crossing spherical-seeded pea plants with dented-seeded pea plants resulted in progeny that all had spherical seeds. This indicates that the dented seed trait is:

A recessive allele is one:

In pea plants, tall plants are dominant over short, and green pods are dominant over yellow. If you crossed true-breeding tall, green-podded plants with true-breeding short, yellow-podded plants, and then crossed the F1 individuals among themselves, what proportion of the F2 offspring would you expect to be tall and yellow-podded?

Human skin color is the result of:

Suppose you cross a pea plant with yellow, smooth seeds with one that has wrinkled, green seeds. You examine the seeds of 967 offspring and find that some have yellow, smooth seeds and some have yellow, wrinkled seeds, but no green seeds of either type show up. What is the genotype of the yellow-seeded parent? (Y = yellow, y = green; S = smooth, s = wrinkled)

A type of muscular dystrophy shows sex-linked recessive inheritance. Affected persons usually die by the age of 20. Suppose that a boy with the disease lives long enough to marry a woman heterozygous for the trait. If they have a son, what is the probability that he will have the disease?

Males always inherit sex-linked traits from their fathers. True or False?

In a test cross, what percentage of the offspring will have the same phenotype as the tested parent if the parent to be tested is homozygous?

If an individual who is homozygous for type B blood marries a heterozygous type A individual, what is the chance that their first child will have type AB blood?

What is the genotype of a dominant individual if some of its offspring show the recessive phenotype?

Sickle-cell anemia is caused by a:

In humans, the sex of the offspring is determined by the:

Image that you self-pollinate heterozygous purple-flowered, long-pollened pea plants and get mostly purple-flowered, short-pollened plants and white-flowered, long-pollened plants, with a very few purple-flowered, long-pollened or white-flowered, short-pollened plants. What is the most likely explanation?

Imagine that a newly discovered species of fish normally has three eyes (E), but the rare mutation (e)causes "diopthalmic" fish with two eyes to be born. In addition, eye color in these fish is inherited similarly to humans, with black eyes (B)being dominant to blue (b). Assuming these two genes are carried on separate chromosomes, what must the genotypes of two black-eyed, three-eyed parents be if they have a blue-eyed, diopthalmic son?

A pea plant with red flowers is test crossed; half of the resulting progeny have red flowers, while the other half have white flowers. The genotype of the test crossed parent was:

According to the law of segregation, in an organism with the genotype Aa:

Which disorder is more common among the babies of older mothers?