Exam 12: Inheritance, Genes, and Chromosomes

In Drosophila, the genes for body coloration and eye size are on different chromosomes.Normal-colored bodies are dominant to ebony-colored (very dark) bodies, and normal-sized eyes are dominant to eyelessness.Line A is true breeding for normal bodies and normal eyes, whereas line B is true breeding for ebony bodies and eyelessness.From an F₂ cross between lines A and B, 800 flies are scored.How many F₂ flies are expected to have normal body color and to be eyeless?

If the same allele has two or more phenotypic effects, it is said to be

Draw a pedigree for at least three generations and 12 individuals that shows the transmission of a recessive autosomal trait.Shade affected individuals, leaving unaffected carriers and those without the mutant allele unshaded.

Which method was not used by Mendel in his study of the genetics of the garden pea?

Draw a pedigree for three generations in which the grandfather has red-green color blindness and his daughter is a carrier.

Different forms of a gene are referred to as

Consider crosses between individuals of different heritable phenotypes.Under which condition will the phenotype of the offspring most likely be influenced by which parent has which phenotype?

The totality of all the genetic material of an organism is known as the organism's _______.

Suppose that two different groups of schmoos (an imaginary animal) live in geographically separated locations and rarely interbreed.On one occasion, a big-footed white-haired schmoo does mate with a small-footed brown-haired schmoo.Six offspring result: two big-footed schmoos with light brown hair and four small-footed schmoos with light brown hair.Which statement about the inheritance of hair color in schmoos is most likely correct?

A centiMorgan is a unit of

Genes located on mitochondrial DNA are usually inherited

A dog has floppy ears.The nature of the ear is a _______, and the floppy nature of this particular dog's ears is the _______.

Suppose members of a true-breeding strain of salamanders with yellow stripes are crossed with a true-breeding strain with red stripes.Red and yellow are two alleles of the same gene.The resulting offspring have both yellow stripes and red stripes.Which dominance pattern is most likely?

The cross AaBb × AaBb is an example of a _______ cross, and the results of such crosses led Mendel to propose what we now call the law of _______.

If white-eyed flies are crossed with other white-eyed flies from the same strain, the offspring will all have white eyes.This trait can thus be said to be

Epistasis refers to

What is the map distance between two genes with a recombination frequency of 0.08?

In the ABO blood type system,

Why do organelle genes tend to have multiple alleles?

Recombination takes place during _______ of meiosis.