genetics, punnett squares, heredity

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.

Tags

NGSS.HS-LS3-2

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as AA or aa.

Front

What does heterozygous mean?

Back

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

Front

What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present (e.g., A in Aa).

Front

What is a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present (e.g., aa).

Tags

NGSS.HS-LS3-2

Front

How do you represent a dominant allele?

Back

A dominant allele is represented by a capital letter.

Front

How do you represent a recessive allele?

Back

A recessive allele is represented by a lowercase letter.

Front

What is the probability of offspring showing a dominant trait if both parents are heterozygous?

Back

75% chance of showing the dominant trait.

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

Front

What is the probability of offspring showing a recessive trait if one parent is homozygous recessive and the other is heterozygous?

Back

50% chance of showing the recessive trait.

Tags

NGSS.HS-LS3-3

Front

What is the genotype for brown hair if brown (B) is dominant over blond (b)?

Back

The genotype can be BB (homozygous dominant) or Bb (heterozygous).

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2