Exam 10: Patterns of Inheritance

The gene for color blindness is a recessive allele located on the X chromosome. If a color-blind man and a color-blind woman have one son and three daughters, how many will be color-blind?

Brown eyes (B) dominate blue eyes (b); black hair (H) dominates blond hair (h). In order to have an offspring ratio of 1/4 brown eyes, black hair, 1/4 brown eyes, blond hair, 1/4 blue eyes, black hair, and 1/4 blue eyes, blond hair, the genotype of the parents would have to be

The Y chromosome is in the

The chances of guessing the right answer to this question are

In pea plants, a gene R produces red flowers and is dominant to a gene r, which produces white flowers. A gene T produces tall plants and is dominant to a gene t for short plants. If a plant that is homozygous for red flowers and heterozygous for tallness is crossed with a plant that is short and white, what will be the phenotypic ratio of the offspring?

When an organism has two different alleles for a given trait, the allele that is expressed, overshadowing the expression of the other allele, is said to be

Two genes located on the same chromosome are

Color blindness is a recessive sex-linked trait. If a man with normal color vision and a woman who is a carrier for the color blindness trait have a son, what is the probability that he will be color-blind?

The sex of the fruit fly Drosophila melangaster is determined as follows: XX chromosomes give a female and XY give a male. The gene for bar eyes is recessive and located on the X chromosome. If you had a normal-eyed female and did not know whether she was homozygous or heterozygous, you could determine her genotype by mating her with

A locus is

According to the diagram, genes ______ are most likely to be inherited together and genes ______ are least likely to be inherited together.

A homozygous condition would be the possession of alleles for

Skin color and height are inherited by

The trait for color dominates albino, and black fur dominates red fur. If an animal homozygous for color and heterozygous for black fur is crossed with an albino homozygous for red, the ratio of offspring would be

The sex chromosomes determine the sex of mammals and are

The probability of parents with the genotypes (Mm) * (Mm) having an offspring with the genotype (mm) is

Human skin color is thought to be determined by at least three pairs of alleles. If dark skin (D) is dominant to light skin (d), the genotypes that will produce the darkest skin are

A research geneticist discovered that a particular trait is controlled by ______ she identified as B, b₁, b₂, b₃, b₄, b₅.

When the two alleles C^R C^W are the genotype of an individual, that person displays features of both alleles. This is known as

If an individual has the genotype BbCc, how many different kinds of gametes can that individual produce?