Punnett Squares & Heredity

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What does dominant mean in genetics?

Back

Dominant refers to an allele that expresses its trait even when only one copy is present in the genotype.

Front

What does recessive mean in genetics?

Back

Recessive refers to an allele that only expresses its trait when two copies are present in the genotype.

Front

If T = tall and t = short, what is the genotype for a short plant?

Back

tt

Front

In a cross Tt x Tt, what is the probability of producing a tall plant?

Back

75%.

Front

In a cross Tt x Tt, what is the probability of producing a short plant?

Back

25%.

Front

If D = brown eyes and d = blue eyes, what is the genotype for a blue-eyed offspring?

Back

dd

Front

In a cross Dd x Dd, what is the probability of producing brown-eyed offspring?

Back

75%.

Front

What is the genotype for a plant with green color if G = green and g = yellow?

Back

GG or Gg.

Front

What is the genotype for a yellow plant if G = green and g = yellow?

Back

gg.