Biology sem 1 wk 3

Front

What is the genotype of a woman with red-green color blindness?

Back

X^b X^b

Front

A person who is a heterozygous for albinism is called a(n) __.

Back

carrier

Front

Which defines an organism that is homozygous for a trait?

Back

has two of the same alleles for a trait

Front

The ability of an Escherichia coli bacterium to control its gene transcription in response to environmental factors is called __.

Back

gene regulation

Front

During replication, the double helix is unwound by the enzyme __.

Back

helicase

Front

What is the definition of a genotype?

Back

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

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait, while heterozygous means having two different alleles.

Front

What is an allele?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What is the role of helicase in DNA replication?

Back

Helicase unwinds the double-stranded DNA, separating the two strands.

Front

What is gene regulation?

Back

Gene regulation is the process by which cells control the expression of genes in response to internal and external signals.