Heredity Practice (Punnett Squares)

Front

What are the chances of heterozygous genotypes in offspring?

Back

50%

Front

B = brown eyes, b = blue eyes. What is true about two brothers with brown eyes, one with genotype BB and the other Bb?

Back

They have the same phenotype but different genotypes.

Front

What are the possible genotypes for a cross that results in TT = 25%, Tt = 50%, tt = 25%?

Back

TT = 25%, Tt = 50%, tt = 25%.

Front

What is the dominant trait when B = brown eyes and b = blue eyes?

Back

Brown eyes.

Front

What does heterozygous mean?

Back

Different.

Front

What is a Punnett Square used for?

Back

To predict the genotypes of offspring from a genetic cross.

Front

Define genotype.

Back

The genetic makeup of an organism, represented by alleles.

Front

Define phenotype.

Back

The observable traits of an organism, determined by its genotype.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait; heterozygous means having two different alleles.

Front

If a plant has the genotype Tt, what are the possible gametes it can produce?

Back

T and t.