Punnett Square Practice

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genetic makeup of offspring from a cross between two parents.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as 'RR' or 'rr'.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, such as 'Rr'.

Front

What is the probability of a homozygous recessive offspring (gg) from a cross of Gg x Gg?

Back

2/4 or 50%.

Front

What is the genotype of a plant with two dominant alleles?

Back

The genotype is homozygous dominant, represented as 'AA'.

Front

What is the genotype of a plant with one dominant and one recessive allele?

Back

The genotype is heterozygous, represented as 'Aa'.

Front

What is the phenotype of a plant with genotype 'tt'?

Back

The phenotype is short, as 't' is recessive.

Front

In a cross between a homozygous tall plant (TT) and a homozygous short plant (tt), what are the expected offspring genotypes?

Back

All offspring will be heterozygous tall (Tt).

Front

What is the expected genotype ratio from a cross of Tt x tt?

Back

50% Tt (tall) and 50% tt (short).

Front

What does the term 'allele' mean?

Back

An allele is a variant form of a gene that can produce different traits.