LS.3 Review

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses (e.g., Rr, BB).

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype and environment.

Front

What does homozygous dominant mean?

Back

Homozygous dominant refers to having two identical dominant alleles for a trait (e.g., TT).

Front

What does heterozygous mean?

Back

Heterozygous means having two different alleles for a trait (e.g., Tt).

Front

How do you represent dominant alleles?

Back

Dominant alleles are represented by capital letters (e.g., T for sharp teeth).

Front

How do you represent recessive alleles?

Back

Recessive alleles are represented by lowercase letters (e.g., t for dull teeth).

Front

What is the significance of a Punnett square?

Back

A Punnett square is a tool used to predict the genetic outcomes of a cross between two organisms.

Front

If a male shark has genotype Tt and a female shark has genotype TT, what are the possible genotypes of their offspring?

Back

The possible genotypes of their offspring are TT and Tt.

Front

Can a homozygous dominant parent produce a recessive offspring?

Back

No, a homozygous dominant parent cannot produce a recessive offspring because it does not carry the recessive allele.

Front

What is the probability of getting a homozygous recessive offspring from a Tt x Tt cross?

Back

The probability is 25%.