Genetics Review Spring 24

Front

What does heterozygous mean?

Back

Having two different genes for a trait.

Front

What is the genotype for an organism with the alleles E (3 eyes) and e (1 eye)?

Back

EE or Ee.

Front

If two brown-eyed parents (Bb) have a baby, what is the chance the baby is blue-eyed?

Back

25%.

Front

What is the definition of genotype?

Back

The exact genetic makeup of an organism, such as RR, Tt, PP.

Front

What is a phenotype?

Back

The physical trait of an organism.

Front

What does homozygous mean?

Back

Having two identical genes for a trait.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the observable traits.

Front

What is a dominant allele?

Back

An allele that expresses its trait even in the presence of a recessive allele.

Front

What is a recessive allele?

Back

An allele that only expresses its trait when two copies are present.

Front

What is a Punnett square used for?

Back

To predict the genetic outcomes of a cross between two organisms.