Chapter 11 Pretest - Introduction to Genetics

Different forms of a gene are called (a)  

• alleles.
• hybrids.
• dominant factors.
• recessive factors.

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

• hybrid.

• heterozygous.

• homozygous.

• dominant.

Answer explanation

"Homo" means same or identical. Homozygous.

True or False. A trait is a specific characteristic, such as seed color or plant height, of an individual.

• True

• False

Tags

NGSS.HS-LS3-1

The offspring of crosses between parents with different traits are called

• heterozygous.

• hybrids.

• alleles.

• genes.

Tags

NGSS.HS-LS3-1

During sexual reproduction, male and female reproductive cells join in a process known as ____________ to produce a new cell.

• genetics

• segregation

• independent assortment

• fertilization

A Punnett square is used to determine the

• probable outcome of a cross.

• actual outcome of a cross.

• result of incomplete dominance.

• result of meiosis.

The physical characteristics of an organism are called its

• genetics.

• heredity.

• phenotype.

• genotype.

The probability of flipping a coin twice and getting two heads is

• 1.

• 1/2.

• 1/4.

• 3/4.

Answer explanation

Probability of flipping a coin and getting one head is 1/2 (or 50/50). To get the probability of flipping two heads is 1/2 * 1/2 = 1/4.

True or False. The term "genotype" refers to the genetic makeup.

• True

• False

Tags

NGSS.HS-LS1-1

The principle of independent assortment states that genes for the same traits can segregate independently during the formation of gametes.

• True

• False

Answer explanation

False. The principle of independent assortment states that genes for different traits can segregate independently during the formation of gametes.