Genetics/Punnett Square Review

Front

What does homozygous dominant mean?

Back

An organism with two identical dominant alleles for a trait (e.g., BB).

Front

What is the definition of heterozygous?

Back

An organism with two different alleles for a trait (e.g., Bb).

Front

What is a Punnett Square?

Back

A diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

If B = brown hair and b = blonde hair, what does BB represent?

Back

BB represents an organism with brown hair, as it has two dominant alleles.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What is the probability of homozygous dominant offspring from a cross of BB and Bb?

Back

The probability is 50%.

Tags

NGSS.HS-LS3-3

Front

What is the probability of heterozygous offspring from a cross of BB and Bb?

Back

The probability is 50%.

Tags

NGSS.HS-LS3-3

Front

If B = brown hair and b = blonde hair, what is the probability of having blonde hair from a Bb x Bb cross?

Back

The probability is 25%.

Tags

NGSS.HS-LS3-3

Front

What does the term 'allele' mean?

Back

An allele is a variant form of a gene that determines a specific trait.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What is the genotype of an organism?

Back

The genotype is the genetic makeup of an organism, represented by the alleles it possesses.

Tags

NGSS.HS-LS3-2

Front

What is the phenotype of an organism?

Back

The phenotype is the observable physical characteristics of an organism, determined by its genotype.