Applied Bio. Unit 5

Front

What is a homozygous recessive genotype?

Back

A homozygous recessive genotype consists of two identical recessive alleles, represented as 'tt'.

Front

What is codominance in genetics?

Back

Codominance is a genetic scenario where two different alleles are expressed simultaneously in a heterozygous organism, resulting in a phenotype that displays both traits.

Front

What genotype must an individual have to express a recessive disorder?

Back

An individual must have a homozygous recessive genotype (hh) to express a recessive disorder.

Front

In a pedigree for a recessive disease, how can you identify individuals without the disease?

Back

Individuals without the recessive disease will have at least one dominant allele in their genotype.

Front

What genotype corresponds to wavy hair in incomplete dominance?

Back

The genotype for wavy hair in incomplete dominance is 'Ww', where 'W' represents the dominant allele for curly hair and 'w' for straight hair.

Front

Define homozygous dominant genotype.

Back

A homozygous dominant genotype consists of two identical dominant alleles, represented as 'TT'.

Front

What is the difference between incomplete dominance and codominance?

Back

Incomplete dominance results in a blended phenotype, while codominance results in both phenotypes being expressed distinctly.

Front

What does a pedigree chart represent in genetics?

Back

A pedigree chart is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors.

Front

How can you determine the genotype of an individual from a pedigree?

Back

You can determine the genotype by analyzing the phenotypes of the individual and their relatives, especially if the trait is recessive.

Front

What is the significance of dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in heterozygous individuals, determining the phenotype.