Monohybrid Cross

Front

What is a Monohybrid Cross?

Back

A genetic cross that involves one trait with opposing characters.

Front

What does it mean if a plant is homozygous?

Back

It means the plant has two identical alleles for a trait, also known as purebred.

Front

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

Back

The phenotype ratio is 3:1, where 3 represent the dominant trait and 1 represents the recessive trait.

Front

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

Back

The genotype ratio is 1:2:1, representing the homozygous dominant, heterozygous, and homozygous recessive genotypes.

Front

If a round seed (R) is dominant over a wrinkled seed (r), what is the genotype of a purebred round seed?

Back

The genotype of a purebred round seed is RR.

Front

In a monohybrid cross, what percentage of offspring will be purebred if a hybrid (Rr) is self-pollinated?

Back

25% of the offspring will be purebred (RR).

Front

What is the expected percentage of short stem garden pea plants in the F1 generation if both parents are heterozygous?

Back

25% of the offspring will be short stem garden pea plants.

Front

What is the term for an organism with two different alleles for a trait?

Back

Heterozygous.

Front

If all offspring in the F1 generation are non-tongue rolling, what are the genotypes of both parents?

Back

Both parents must be homozygous recessive (tt).

Front

What is the expected phenotype of offspring from a cross between a homozygous dominant and a homozygous recessive parent?

Back

All offspring will display the dominant phenotype.