Applied Bio. Unit 5

Front

What is codominance?

Back

Codominance is a genetic scenario where two different alleles are expressed equally in the phenotype of a heterozygous organism, resulting in both traits being visible.

Front

What are the chances of offspring being homozygous recessive if both parents are homozygous recessive?

Back

100% - All offspring will inherit the recessive allele from both parents.

Front

What does heterozygous mean?

Back

Heterozygous refers to an organism that has two different alleles for a specific gene, such as Tt.

Front

In a pedigree chart, how can you identify individuals with a recessive disease?

Back

Individuals with a recessive disease will have two recessive alleles. In a pedigree, they are often represented by filled symbols.

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic situation where a heterozygous phenotype is intermediate between the two homozygous phenotypes, such as wavy hair being a blend of curly and straight.

Front

What genotype represents a person with wavy hair in incomplete dominance?

Back

Ww - This genotype indicates one dominant allele and one recessive allele.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait (e.g., TT or tt), while heterozygous means having two different alleles (e.g., Tt).

Front

What is a pedigree chart used for?

Back

A pedigree chart is used to track the inheritance of traits through generations in a family.

Front

What does it mean if a trait is recessive?

Back

A recessive trait is one that is expressed only when an individual has two copies of the recessive allele.

Front

What is the significance of multiple alleles in genetics?

Back

Multiple alleles refer to the presence of more than two alleles for a genetic trait, allowing for a variety of phenotypes.