Genetics Review Spring 24

Front

What is a phenotype?

Back

The physical trait of an organism, such as color or shape.

Front

What is a genotype?

Back

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

Front

What does homozygous mean?

Back

Having two of the same genes for a trait (e.g., BB or bb).

Front

What does heterozygous mean?

Back

Having two different genes for a trait (e.g., Bb).

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present; recessive traits are expressed only when two recessive alleles are present.

Front

If green is dominant over purple, what is the phenotype of a plant with genotype gg?

Back

The phenotype is purple.

Front

Which of the following is a phenotype: BB, Bb, bb, or blue eyes?

Back

Blue eyes.

Front

What is the phenotype for an organism with genotype BB?

Back

The phenotype is blue.

Front

What does it mean if an organism is purebred?

Back

It means the organism is homozygous for a trait.

Front

What is the significance of the Punnett square in genetics?

Back

It is a tool used to predict the genotypes and phenotypes of offspring from parental crosses.