Friday Checkpoint: Genetics & Punnett Squares

Front

What is the genotype of a hybrid organism?

Back

A hybrid organism has a genotype that is heterozygous, meaning it has two different alleles for a trait (e.g., Rr).

Front

Define homozygous dominant.

Back

Homozygous dominant refers to an organism that has two identical dominant alleles for a trait (e.g., AA).

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 purebred?

Back

A purebred organism has a homozygous genotype, meaning it has two identical alleles for a trait (e.g., RR or rr).

Front

What is the phenotype of an organism?

Back

The phenotype is the observable physical characteristics of an organism, determined by its genotype.

Front

What is a Punnett square used for?

Back

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

Front

If a plant has the genotype gg, what color will it be?

Back

The plant will be yellow, as gg is the only genotype that results in the yellow phenotype.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in heterozygous genotypes (e.g., Rr: R is dominant, r is recessive).

Front

What does heterozygous mean?

Back

Heterozygous means having two different alleles for a particular gene (e.g., Rr).

Front

What is the genotype for a homozygous recessive organism?

Back

The genotype for a homozygous recessive organism is represented as 'rr'.