Unit 6 Review

Front

What genetic disorder is indicated by having 3 copies of chromosome #21?

Back

Down's Syndrome

Front

Is Huntington's disease caused by a dominant or recessive trait?

Back

Dominant

Front

What type of inheritance controls blood types in humans?

Back

Multiple alleles

Front

How is cystic fibrosis maintained in the gene pool despite being a lethal autosomal recessive disorder?

Back

Organisms that are heterozygous can pass on either dominant or recessive alleles.

Front

What is the genotype of a white-eyed male fly?

Back

X^rY

Front

What is the definition of a karyotype?

Back

A karyotype is a visual representation of an individual's chromosomes, arranged in pairs.

Front

What does it mean for a trait to be autosomal recessive?

Back

A trait is autosomal recessive if two copies of the recessive allele are required for the trait to be expressed.

Front

What is the significance of heterozygous individuals in a population?

Back

Heterozygous individuals can carry and pass on recessive alleles, contributing to genetic diversity.

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present, while recessive traits are only expressed when two recessive alleles are present.

Front

How many alleles are involved in determining blood types?

Back

Three alleles (A, B, and O) are involved in determining blood types.