Punnett Squares

Front

What are the letters that represent different forms of a gene?

Back

Allele

Front

What do you call having two DIFFERENT alleles for a trait?

Back

Heterozygous

Front

What is the probability of producing heterozygous offspring from a Punnett square?

Back

50%

Front

What probability does each box on a Punnett square represent for an offspring's genotype?

Back

25%

Front

What do genotype codes represent?

Back

Phenotype (physical trait)

Front

What is a Punnett square used for?

Back

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

Front

What is the term for having two identical alleles for a trait?

Back

Homozygous

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the physical expression of 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.