Punnett squares

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 in a Punnett square represent?

Back

The letters represent alleles, which are different forms of a gene. Uppercase letters indicate dominant alleles, while lowercase letters indicate recessive alleles.

Tags

NGSS.HS-LS3-2

Front

What is a homozygous genotype?

Back

A homozygous genotype has two identical alleles for a trait, such as AA or aa.

Front

What is a heterozygous genotype?

Back

A heterozygous genotype has two different alleles for a trait, such as Aa.

Tags

NGSS.HS-LS3-2

Front

What does it mean if an organism is homozygous dominant?

Back

It means the organism has two dominant alleles for a trait, such as YY.

Tags

NGSS.HS-LS3-1

Front

What does it mean if an organism is homozygous recessive?

Back

It means the organism has two recessive alleles for a trait, such as yy.

Front

What is the phenotypic ratio in a monohybrid cross?

Back

The phenotypic ratio in a monohybrid cross is typically 3:1 for dominant to recessive traits.

Front

What is the genotypic ratio in a monohybrid cross?

Back

The genotypic ratio in a monohybrid cross is typically 1:2:1 for homozygous dominant, heterozygous, and homozygous recessive genotypes.

Front

If T = tall and t = short, what is the phenotype of TT?

Back

The phenotype of TT is tall.

Tags

NGSS.HS-LS3-1

Front

If T = tall and t = short, what is the phenotype of Tt?

Back

The phenotype of Tt is tall.