Summative Quiz for Chapter 8 – Flashcards

The 9:3:3:1 ratio is obtained

In sex-linked inheritance of a recessive gene, if a normal male and a heterozygous female carrier are mated, all

Wild-type fruit flies have red eyes. A white-eyed female fly is crossed with a red-eyed male fly. All of the females from the cross are red-eyed and all of the males are white-eyed. What type of inheritance pattern is this?

Which statement about linkage of genes is FALSE?

When a true-breeding red flower is crossed with a white flower, and all the F1 flowers are pink, this is due to

____________ is the term for when heterozygous offspring have superior fitness than their homozygous parents.

Genes located on mitochondrial DNA are usually inherited

Incomplete dominance

A woman of blood group A has a child with a man of blood group B. The child's blood type is O. What are the genotypes of the parents?

The fact that a trait such as height in humans varies over a wide range of values is due to

Mendel concluded that each pea has two units for each character, and each gamete contains one unit. Mendel's "unit" is now referred to as a

Codominance

What fraction of the offspring of the cross AaBb X AaBb would show the dominant phenotypes for both genes?

In a test cross, peas of an unknown genotype are crossed with peas of a known genotype. In this example, smooth peas are the unknown and wrinkled peas are the known (rr). If half of the offspring from that cross are smooth and half are wrinkled, what is the genotype of the unknown plant?

Coat color in rabbits involves the effects of multiple gene interactions. If a rabbit has two recessive alleles for coat color, it is always albino no matter what the genotype of other genes involved in coat color. This is an example of

In many animals, including humans, sex is determined by a single ____________, or by a pair of them. Both males and females have two copies of each of the rest of the chromosomes, which are called ___________.

What fraction of offspring of the cross Aa x Aa is homozygous for the dominant allele?

The cross AaBb X AaBb is an example of a ____________ cross; the results of such crosses led Mendel to propose what we now call the law of ____________.

Suppose unattached earlobes are a dominant trait. Phil and Maggie both have unattached earlobes but their daughter, Celia, does not. If Phil and Maggie have a second child, what is the probability that he or she will have attached earlobes?