Genotype-Phenotype

Front

What is a phenotype?

Back

A 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

A genotype is the genetic constitution of an individual, specifically the alleles present for a particular gene.

Front

What does homozygous mean?

Back

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

Front

What does heterozygous mean?

Back

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

Front

What is the difference between dominant and recessive alleles?

Back

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

Front

If brown eyes (B) are dominant over blue eyes (b), what is the phenotype of a Bb genotype?

Back

The phenotype of a Bb genotype is brown eyes.

Front

What is the phenotype for the genotype 'aa'?

Back

The phenotype for the genotype 'aa' is a recessive trait, which in this case would be blue eyes if 'a' represents blue.

Front

How do you classify the genotype 'ff'?

Back

The genotype 'ff' is classified as homozygous recessive.

Front

What is an example of a homozygous dominant genotype?

Back

An example of a homozygous dominant genotype is 'BB', where both alleles are dominant.

Front

What is an example of a heterozygous genotype?

Back

An example of a heterozygous genotype is 'Bb', where one allele is dominant and the other is recessive.