Genetics REVIEW

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by letters (e.g., Bb, YY).

Front

What is a phenotype?

Back

The physical expression or characteristics of a trait (e.g., blue eyes, brown hair).

Front

What does homozygous mean?

Back

Having two identical alleles for a particular gene (e.g., SS or ss).

Front

What does heterozygous mean?

Back

Having two different alleles for a particular gene (e.g., Bb or Yy).

Front

What is a purebred organism?

Back

An organism that has two identical alleles for a trait (homozygous).

Front

What is a hybrid organism?

Back

An organism that has two different alleles for a trait (heterozygous).

Front

What is the probability of getting a blue-eyed child from two brown-eyed parents (Bb)?

Back

25% chance of being blue-eyed.

Front

What is the significance of the Punnett square?

Back

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

Front

What are alleles?

Back

Different forms of a gene that can exist at a specific locus on a chromosome.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in heterozygous conditions.