Genetics

Front

What is the definition of homozygous?

Back

Homozygous refers to having two identical alleles for a particular gene, such as AA or aa.

Front

What is the definition of heterozygous?

Back

Heterozygous refers to having two different alleles for a particular gene, such as Aa.

Front

What is a phenotype?

Back

Phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

Front

What is a genotype?

Back

Genotype is the genetic constitution of an individual, represented by the alleles inherited from the parents.

Front

What does it mean if an organism is homozygous recessive?

Back

An organism is homozygous recessive if it has two recessive alleles for a trait, such as 'tt' for hair color.

Front

What is the probability of offspring being homozygous dominant from two heterozygous parents?

Back

The probability is 25%.

Front

What is the probability of offspring being heterozygous from two heterozygous parents?

Back

The probability is 50%.

Front

What is the expected phenotype ratio from a monohybrid cross?

Back

The expected phenotype ratio is typically 3:1 for dominant to recessive traits.

Front

What is the expected genotype ratio from a monohybrid cross?

Back

The expected genotype ratio is 1:2:1 for homozygous dominant, heterozygous, and homozygous recessive.

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.