Quiz 4: Topic 4 - Genetic Inheritance

A plant with purple flowers is allowed to self-pollinate. Generation after generation, it

produces purple flowers. This is an example of …

• hybridization.

• true-breeding

• incomplete dominance

• the law of segregation.

In Mendel’s time, most people believed that …

• all genetic traits bred true.

• the characteristics of parents were blended in the offspring.

• acquired characteristics were inherited.

• the inheritance of traits was controlled by blood.

If short hair (L) is dominant to long hair (l), animals LL and Ll have the same …

• genotypes.

• phenotypes.

• alleles.

• genes.

What is a genetic cross called between an individual of unknown genotype and a homozygous recessive?

• A self-cross

• A test cross

• An F₁ cross

• A dihybrid cross

How many sex chromosomes are found in a human male liver cell?

• 1

• 2

• 23

• 46

Which of the following terms is least related to the others?

• Homozygous

• Tetrad

• Recessive

• Heterozygous

If all offspring of a cross have the genotype Aa, the parents of the cross would most likely be…

• AA x aa

• Aa x aa

• Aa x Aa.

• AA x Aa

The usual F₂ phenotypic ratio of a monohybrid cross is …

• 1:1.

• 2:1.

• 9:3:3:1.

• 3:1

P = purple, p = white. The offspring of a cross of two heterozygous purple-flowering plants results in …

• all purple-flowered plants.

• purple-flowered plants and white-flowered plants.

• two types of white-flowered plants: PP and Pp.

• all white-flowered plants.

Assume short hair (L) is dominant to long hair (l) and black hair (B) is dominant to brown (b). If you found a black short-haired animal, you could determine its genotype by crossing it to an animal with a genotype of …

• LLBB.

• llbb.

• llBB.

• LLbb