Punnett Square Practice

Front

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

Back

50 percent Tt, 50 percent tt

Front

If 'S' is the dominant allele for smooth pea plants, while 's' is the recessive allele for wrinkled plants, what percent of the offspring will be wrinkled if we cross two heterozygous round pea plants?

Back

25%

Front

Having two of the same genes for the same trait is called ___

Back

homozygous

Front

Homozygous is when...

Back

the alleles are the same

Front

A ____ is physical appearance.

Back

phenotype

Front

What is the definition of a genotype?

Back

The genetic makeup of an organism.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even if only one copy is present, while recessive alleles require two copies to express their trait.

Front

What is a Punnett Square used for?

Back

To predict the genotypes and phenotypes of offspring from genetic crosses.

Front

If a homozygous dominant plant (TT) is crossed with a homozygous recessive plant (tt), what will be the genotype of the offspring?

Back

100% Tt

Front

What is the expected phenotype ratio of a monohybrid cross between two heterozygous parents (Tt x Tt)?

Back

3 tall : 1 short