Genetics

Question 1

Define a gene.

Answer 1

A sequence of bases that code for a sequence of amino acids in a polypeptide chain.

Question 2

Define an allele.

Answer 2

A version of a gene

Question 3

Define a genotype.

Answer 3

The genetics of an organism.

Question 4

Define a phenotype.

Answer 4

Observable characteristics e.g. eye colour

Question 5

Define a recessive allele.

Answer 5

An allele only present when 2 copies are present.

Question 6

Define a dominant allele.

Answer 6

An allele that is always expressed

Question 7

What is incomplete dominance?

Answer 7

Neither allele is dominant so the phenotype is a mix of 2 alleles.

Question 8

Define homozygote

Answer 8

Two of the same alleles

Question 9

Define heterozygote

Answer 9

One of each allele

Question 10

What is monohybrid inheritance?

Answer 10

The inheritance of one characteristic, controlled by one gene

Question 11

What is codominance?

Answer 11

2 alleles of the same gene are described as codominant if both are expressed in the phenotype of a heterozygote