Pre-TEST--UNIT 5: Intro to Genetics

Different forms of genes are called:

• hybrids

• dominant factors

• alleles

• recessive factors

Organisms that have two identical genes for a particular trait are said to be:

• heterozygous

• homozygous

• hybrids

• dominant

Mendel studied traits in pea plants. One of the crosses he made was between plants with round seeds and plants with wrinkled seeds. What was a conclusion Mendel drew from the F₁ generation of this cross?

• The dominant factor, or allele, is for round seeds.

• The dominant factor, or allele, is for wrinkled seeds.

• The factors or alleles for round seeds disappear completely from the plants.

• The factors or alleles for wrinkled seeds disappear completely from the plants.

A Punnett square is used to determine the....

• probable outcome of a genetic cross

• actual outcome of a genetic cross

• result of incomplete dominance.

• result of meiosis

The PHYSICAL characteristics of an organism are called its...

• phenotype

• Genotype

• genetics

• heredity

What is the probability of flipping a coin twice in a row, and getting heads both times?

• 1 (100% chance)

• 1/2 (50 % chance)

• 1/4 (25% chance)

• 3/4 (75 % chance)

"B" represents BROWN eyes (dominant). "b" represents BLUE eyes (recessive). Given the Punnett square, which box DOES NOT represent a brown eyed offspring?

• 1

• 2

• 3

• 4

A situation in which a gene has more than 2 alleles is known as:

• complete dominance

• codominance

• polygenic dominance

• multiple alleles

A pink flowering plant (Rr) is crossed with a white flowering plant (rr). What are the chances this cross will create a red flowering plant (RR)?

• 0

• 1/4 (25% Chance)

• 1/2 (50% chance)

• 1 (100% chance)

This drawing shows which stage of meiosis?

• prophase 1

• prophase 2

• metaphase 1

• metaphase 2