10.2 Genetics & Punnett Squares

Front

What is the genotype of an organism?

Back

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

Front

What is the phenotype of an organism?

Back

The phenotype is the physical appearance or observable traits of an organism, resulting from the interaction of its genotype with the environment.

Front

What are alleles?

Back

Alleles are different versions of a gene that determine specific traits (e.g., tall or short plants).

Front

What does it mean if an organism is homozygous?

Back

An organism is homozygous if it has two identical alleles for a particular gene (e.g., RR or rr).

Front

What does it mean if an organism is heterozygous?

Back

An organism is heterozygous if it has two different alleles for a particular gene (e.g., Rr).

Front

What is a Punnett Square?

Back

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

Front

What is the purpose of a Punnett Square?

Back

The purpose of a Punnett Square is to determine the probability of an offspring inheriting particular traits from its parents.

Front

What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present (e.g., R in Rr).

Front

What is a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present (e.g., rr).

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic constitution of an organism, while phenotype refers to the observable characteristics.