Inheritance Terms

Question 1

Gene

Answer 1

A sequence of nucleotides on DNA that codes for a particular protein

Question 2

Locus

Answer 2

Site on a chromosome occupied by a gene

Question 3

Allele

Answer 3

Different forms of the same gene

Question 4

Dominant

Answer 4

A gene always expressed when present

Question 5

Recessive

Answer 5

A gene only expressed in a homozygous pair

Question 6

Co dominant

Answer 6

Both alleles contribute to a phenotype

Question 7

Phenotype

Answer 7

The characteristics of an organism

Question 8

Genotype

Answer 8

The alleles contained in an organism

Question 9

Homozygous

Answer 9

Alleles are the same e.g HH or hh

Question 10

Heterozygous

Answer 10

Alleles are different e.g Hh

Question 11

F1

Answer 11

First generation in a genetic cross that starts with a pair of homozygotes

Question 12

F2

Answer 12

Second generation produced by crossing the F1 generation

Question 13

Autosomes

Answer 13

A chromosome that isn’t a sex chromosome. In humans, they’re numbered 1-22

Question 14

Sex chromosomes

Answer 14

Sex chromosomes, usually X and Y, in humans this is pair 23

Question 15

Incomplete dominance

Answer 15

A blend of both alleles can be seen in a phenotype