Genetics

Question 1

Define Gene

Answer 1

A gene is a hereditary unit composed of a DNA section. They occupy a specific location on a chromosome. Genes determine the characteristics of an organism by directing the formation of a protein.

Question 2

Define gene locus

Answer 2

a fixed point on a chromosome for a gene

Question 3

Define allele

Answer 3

variation of a gene at a particular gene locus

Question 4

Define genotype

Answer 4

the allele combination of an individual

Question 5

Define phenotype

Answer 5

the physical, behavioral or physiological characteristics of an organism which are a result of the combination of the genotype and the environment.

Question 6

Define dominant

Answer 6

Allele will be expressed in the heterozygous genotype

Question 7

Define recessive

Answer 7

Only expressed in the phenotype when the genotype is homozygous.

Question 8

Define homozygous

Answer 8

Two of the same alleles for a gene at a specific gene locus

Question 9

Define heterozygous

Answer 9

Two different alleles for a gene at a specific gene locus

Question 10

Define chromosome

Answer 10

Long thread like structure
Made of DNA
Carries genes

Question 11

Define autosomal

Answer 11

To do with chromosomes that are not sex chromosomes