Punnett Square Practice

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 do the letters G and g represent in genetics?

Back

In genetics, uppercase letters (e.g., G) represent dominant alleles, while lowercase letters (e.g., g) represent recessive alleles.

Front

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

Back

The genotype for a green plant can be either GG (homozygous dominant) or Gg (heterozygous).

Front

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

Back

The genotype for a yellow plant is gg (homozygous recessive).

Front

What are the possible genotypes of offspring from two heterozygous parents (Gg x Gg)?

Back

The possible genotypes are GG, Gg, and gg.

Front

What is the probability of obtaining a homozygous recessive offspring from a cross of two heterozygous parents (Gg x Gg)?

Back

The probability of obtaining a homozygous recessive offspring (gg) is 25%.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Gg).

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., GG or gg).

Front

In a Punnett Square, what do the boxes represent?

Back

The boxes in a Punnett Square represent the possible genotypes of the offspring resulting from the genetic cross.

Front

If a plant has the genotype Bb, what are the possible phenotypes?

Back

The possible phenotypes are determined by the dominant allele (B) and may include the dominant trait or the recessive trait depending on the context.