Probability of Inheritance Pre-Test GA-GSE Biology A-CR 17-18

Purple flowers are dominant over white flowers. A heterozygous purple flower is crossed with another heterozygous purple flower. The ratio of purple to white would be .

3:1

Gregor Mendel crossed homozygous tall plants (TT) with homozygous short plants (tt). All the resulting offspring were tall. From these results, what conclusion did Mendel draw?

A.Tallness is a dominant trait.

Which term describes an organism that has identical alleles for a trait?

A.homozygous

Which describes the mating of organisms that have different homozygous alleles for a single trait?

A.monohybrid cross

Mendel crossed two plants that were heterozygous for purple flower color. Which genotypes could he have used to represent the cross?

B.Pp ´ Pp

The image shows a white sweet pea that is labeled with its two alleles for petal color. mc020-1.jpg What can you surmise from the labeled image?

B.White petal color is a recessive trait.

A plant can produce either purple flowers or white flowers. What is the probability of purple-flowered offspring if two plants that are heterozygous for purple flowers are crossed?

C.3:4

In pea plants, tallness (T) is dominant to shortness (t). What is the predicted genotypic ratio of the offspring if a homozygous short plant is crossed with a heterozygous tall plant?

C.50 percent Tt, 50 percent tt

Why did Gregor Mendel study pea plants?

D.They reproduce sexually.

Which includes the physical characteristics of an organism?

D.phenotype