Genetics Semester Test Review

Front

What does Mendel's law of segregation state?

Back

During meiosis, the alleles that control each trait separate, and only one allele from each pair is passed to the offspring.

Front

What are the chances of two heterozygous carriers of Tay-Sachs having a child who is also a heterozygous carrier?

Back

50%.

Front

How can children of two parents with brown hair and brown eyes have blond hair and blue eyes?

Back

The children inherited one recessive gene from each parent.

Front

What is the yellow seed genotype in genetics?

Back

AA or Aa.

Front

What are the chances of a child having sickle cell anemia if both parents are carriers?

Back

One in four.

Front

Define autosomal recessive disorder.

Back

A genetic condition that requires two copies of the recessive allele for the trait to be expressed.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by alleles.

Front

What is a phenotype?

Back

The observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait, while heterozygous means having two different alleles.

Front

What is a dominant trait?

Back

A trait that is expressed when at least one dominant allele is present.