Genotype, Phenotype, & Punnett Squares

Front

What is a genotype?

Back

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

Front

What is a phenotype?

Back

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

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What does it mean for an allele to be dominant?

Back

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

Front

What does it mean for an allele to be recessive?

Back

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

Front

In a heterozygous genotype, which allele is expressed in the phenotype?

Back

The dominant allele is expressed in the phenotype.

Front

What is a Punnett square used for?

Back

A Punnett square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Tags

NGSS.HS-LS3-1

Front

If T represents tall and t represents short, what is the genotype for a short plant?

Back

The genotype for a short plant is tt.

Front

What is the genotype of a guinea pig that is hairless, given that hair is dominant to no hair?

Back

The genotype of a hairless guinea pig is hh.

Front

What is an example of a dominant trait in pea plants?

Back

An example of a dominant trait in pea plants is yellow pea seeds.

Tags

NGSS.HS-LS4-3

Front

What is an example of a phenotype?

Back

An example of a phenotype is red hair.

Tags

NGSS.HS-LS3-1