7.3 Monohybrid Punnett Squares 2023

Front

What is a monohybrid cross?

Back

A monohybrid cross is a genetic cross between two individuals that differ in one trait, focusing on the inheritance of a single characteristic.

Front

Define dominant allele.

Back

A dominant allele is an allele that expresses its trait even when only one copy is present in the genotype.

Front

Define recessive allele.

Back

A recessive allele is an allele that only expresses its trait when two copies are present in the genotype.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene.

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the genotypes of offspring from a genetic cross.

Front

What is the expected phenotypic ratio in a monohybrid cross between two heterozygous parents?

Back

The expected phenotypic ratio is 3:1, with three exhibiting the dominant trait and one exhibiting the recessive trait.

Front

If a heterozygous tall plant (Tt) is crossed with a short plant (tt), what is the expected genotype ratio of the offspring?

Back

The expected genotype ratio is 1 Tt : 1 tt.