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Probability of Inheritance

Terms in this set (10)

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?
Tallness is a dominant trait.
Which includes the physical characteristics of an organism?
phenotype
The image shows a purple sweet pea that is labeled with its two alleles for petal color.

mc021-1.jpg

Which is the genotype of the sweet pea?
homozygous dominant
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?
White petal color is a recessive trait.
A dihybrid cross is created from plants that are heterozygous for both round seeds and yellow seed color. What is the ratio of offspring that have round seeds and yellow seed color?
9:16
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?
3:4
The Punnett square predicts the ratio of genotypes in the offspring, based on the genotypes of the parents. In this cross, tallness (H) is dominant to shortness (h).

mc016-1.jpg

Based on the Punnett square, what is the phenotype of the offspring?
tall
Why did Gregor Mendel study pea plants?
They reproduce sexually.
Why did Gregor Mendel choose to use purebred plants in his experiments?
(NOT) They have a variety of traits.
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