Monohybrid Cross Practice (Punnett Squares)

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses (e.g., AA, Aa, aa).

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype and environment (e.g., red hair, tall stature).

Front

Define homozygous. What are the two types?

Back

Homozygous refers to having two identical alleles for a particular gene. The two types are homozygous dominant (e.g., AA) and homozygous recessive (e.g., aa).

Front

Define heterozygous. What does it represent?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Aa).

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

If a homozygous dominant allele (AA) is crossed with a homozygous recessive allele (aa), what will be the genotype of the offspring?

Back

All offspring will be heterozygous (Aa).

Front

What does the letter 'T' represent in genetics?

Back

In genetics, 'T' typically represents a dominant allele, while 't' represents a recessive allele.

Front

What is the expected phenotype ratio in a monohybrid cross?

Back

The expected phenotype ratio in a monohybrid cross is typically 3:1 for dominant to recessive traits.

Front

What is the significance of dominant and recessive alleles?

Back

Dominant alleles express their traits even when only one copy is present, while recessive alleles require two copies to express their traits.

Front

How do you determine the genotype of an organism showing a dominant phenotype?

Back

To determine the genotype, a test cross can be performed with a homozygous recessive individual.