B-LS3-3 Genetics & Punnett Squares

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genotype and phenotype combinations of a genetic cross.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Front

What does homozygous mean?

Back

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

Front

What does heterozygous mean?

Back

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

Front

What is the genotype for Type O blood?

Back

The genotype for Type O blood is ii.

Tags

NGSS.HS-LS3-1

Front

What is codominance?

Back

Codominance is a genetic scenario where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive.

Front

What is the phenotypic ratio of a monohybrid cross?

Back

The phenotypic ratio of a monohybrid cross is typically 3:1.

Tags

NGSS.HS-LS3-3

Front

What is the F1 generation?

Back

The F1 generation is the first generation of offspring produced from a cross of two parental (P) organisms.

Tags

NGSS.MS-LS3-2

Front

What is the significance of the I^A and I^B alleles?

Back

I^A and I^B alleles are responsible for the ABO blood group system, where I^A and I^B are codominant to each other.

Front

What is the expected phenotype ratio when crossing a red flower (RR) with a speckled flower (RB)?

Back

The expected phenotype ratio is 2 red flowers to 2 speckled flowers.

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.