Exam 11: The Basic Principles of Heredity

A female black cat mated with an albino male and gave birth to 6 black kittens.When the albino male was mated with a different female black cat, 3 black cats and 2 albino cats were produced.How can you explain this genetic situation? Write genotypes for all three parental cats and offspring.

A gene that affects, prevents, or masks the expression of a gene at another locus is a(n) __________ gene.

MATCHING a.incomplete d.pleiotropy b.codominance e.polygenic c.epistasis -The heterozygote expresses the phenotypes of both types of homozygotes.

In peas, Mendel found that tall plants and yellow peas are dominant.The phenotype for a pea plant with the genotype TtYy would be:

Calico cats are never male because:

A testcross determines phenotype. __________________

Mating a true-breeding pink rose plant with a true-breeding pink rose plant will produce:

A Barr body in a mammalian female cell represents:

MATCHING a.incomplete d.pleiotropy b.codominance e.polygenic c.epistasis -The offspring exhibit a continuous variation in phenotype

What are the predicted phenotypes of the male children from the union of a woman who is heterozygous for hemophilia and a man who has normal blood clotting characteristics? (Use the Punnett square to verify your answer.)

Why is color-blindness more common in males than in females?

Mating an individual expressing a dominant phenotype, but whose genotype is unknown, with an individual expressing the corresponding recessive phenotype is an example of:

The term "dominant" means that:

A __________ is best used to demonstrate the linkage of two genes.

Two Martians fall in love and marry.One Martian is homozygous for red eyes and the other is heterozygous.The recessive eye color is purple.What is the probability that the alien couple will have a child that is heterozygous for eye color?

Independent assortment occurs between two pairs of homologous chromosomes that can be arranged in four different ways at metaphase of meiosis. __________________

Breeding a yellow dog with a brown dog produced puppies with both yellow and brown hairs intermixed.This is an example of:

In a two-point test cross, 36 of the offspring were recombinant types.The remaining 64 offspring were parental types.How many map units separate the two loci?

The sex of a human is determined by:

A diploid individual has a maximum of __________ different alleles for a particular locus.