Exam Review - Genetics and Heredity

Front

What are the possible genotypes for a cross where TT = 25%, Tt = 50%, tt = 25%?

Back

TT = 25%, Tt = 50%, tt = 25%.

Front

Bb is a ______.

Back

genotype.

Front

In a heterozygous person, the _______ allele determines the phenotype.

Back

dominant.

Front

Which of the following is NOT true of a trait? A trait is a feature that an organism inherits. A trait is given to you by your environment. A trait is located in your genotype. Traits are passed from parents to their offspring.

Back

A trait is given to you by your environment.

Front

What is the genotype for a yellow plant if G = green and g = yellow?

Back

gg.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by letters (e.g., TT, Tt, tt).

Front

What is a phenotype?

Back

The physical expression or characteristics of a genotype (e.g., tall or short plants).

Front

What does homozygous mean?

Back

Having two identical alleles for a trait (e.g., TT or tt).

Front

What does heterozygous mean?

Back

Having two different alleles for a trait (e.g., Tt).

Front

What is the law of segregation?

Back

The principle that during the formation of gametes, the two alleles for a trait separate from each other.