Key terms

Question 1

Gene

Answer 1

Sequence of bases of DNA that code for a protien

Question 2

Allele

Answer 2

Different form of a gene

Question 3

Loci

Answer 3

Position of allele on a chromosome

Question 4

Diploid cell

Answer 4

2 copies of each chromosome

Question 5

Haploid

Answer 5

On copy of each chromosome

Question 6

Genotype

Answer 6

the different alleles an organism has

Question 7

Phenotype

Answer 7

the expression of the genotype and its interaction with the environment

Question 8

Dominant

Answer 8

always expressed in the phenotype

Question 9

Recessive

Answer 9

Only expressed in phenotype if a dominant called is not present

Question 10

Homozygous

Answer 10

2 copies of the same allele

Question 11

Heterozygous

Answer 11

1 of each copy of allele

e.g. Bb

Question 12

Dihybrid inheritance

Answer 12

inheritance of 2 characteristics controlled by 2 separate genes

Question 13

Phenotypic ratio

Answer 13

Ratio of different phenotypes in offspring

Question 14

Co-dominance

Answer 14

Both alleles are expressed in the phenotype

Question 15

Linkage

Answer 15

where genes are on the same chromosome

Question 16

Sex-linked

Answer 16

Gene is on the X chromosome of the sex pair

Question 17

Autosomal linkage

Answer 17

2 genes are on the same autosomal chromosome