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 does the letter 'T' represent in genetics?

Back

The letter 'T' typically represents a dominant allele for a trait, such as tallness in plants.

Front

What does the letter 't' represent in genetics?

Back

The letter 't' typically represents a recessive allele for a trait, such as shortness in plants.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the combination of alleles (e.g., TT, Tt, tt).

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics 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 (e.g., TT or tt), while heterozygous means having two different alleles (e.g., Tt).

Front

What is the expected genotype ratio from a monohybrid cross?

Back

The expected genotype ratio from a monohybrid cross is typically 1:2:1 (1 homozygous dominant : 2 heterozygous : 1 homozygous recessive).

Front

What is the expected phenotype ratio from a monohybrid cross?

Back

The expected phenotype ratio from a monohybrid cross is typically 3:1 (3 dominant phenotype : 1 recessive phenotype).

Front

What does 'Rr' represent in genetics?

Back

'Rr' represents a heterozygous genotype where 'R' is a dominant allele and 'r' is a recessive allele.

Front

What is the purpose of a test cross?

Back

A test cross is used to determine the genotype of an individual with a dominant phenotype by crossing it with a homozygous recessive individual.