DOL - Biology Monohybrid Cross

Front

What is a monohybrid cross?

Back

A genetic cross between individuals that differ in one trait, typically involving one pair of contrasting traits.

Front

Define allele.

Back

An allele is a variant form of a gene that can produce different traits.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., AA or aa).

Front

What does heterozygous mean?

Back

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

Front

What is the phenotype?

Back

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

Front

What is the genotype?

Back

The genotype is the genetic constitution of an individual, represented by the alleles it possesses.

Front

Explain the concept of dominant and recessive alleles.

Back

A dominant allele is expressed in the phenotype even when only one copy is present, while a recessive allele is only expressed when two copies are present.

Front

What is a Punnett square?

Back

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

Front

If two heterozygous individuals (Aa) are crossed, what is the expected genotype ratio of the offspring?

Back

1 AA : 2 Aa : 1 aa.

Front

What is the expected phenotype ratio from a heterozygous cross (Aa x Aa)?

Back

3 dominant phenotype : 1 recessive phenotype.