B13-Reproduction Flashcards
1
Q
Define gamete
A
Sex cell, e.g.sperm and egg
2
Q
Define chromosome
A
DNA strcutures inside the nucleus. Humans have 23 pairs.
3
Q
Define gene
A
Section of DNA on a chromosome
4
Q
Allele
A
Version of a gene
5
Q
Define dominant
A
Alleles which are always expressed, even when there is only one
6
Q
Define recessive
A
Alleles which are only expressed if two alleles are present
7
Q
Define homozygous
A
Alleles in a matching pair are the same
8
Q
Define heterozygous
A
Alleles in a matching pair are different
9
Q
Define genotype
A
Allele pair for each characteristic
10
Q
Define phenotype
A
Physical expression of an allele pair
