Chapter 17 Flashcards
1
Q
genotype definition
A
all the alleles an organism possesses
2
Q
phenotype definition
A
expression of the genotype and its interaction with the environment
3
Q
gene definition
A
a region of DNA that codes for a specific polypeptide or functional RNA
4
Q
allele definition
A
different versions of the same gene
5
Q
homozygous
A
alleles are the same
6
Q
heterozygous
A
alleles are different and the dominant allele is expressed
7
Q
ratio from an F2 dihybrid cross
A
9:3:3:1
8
Q
Sex linkage
A
occurs when genes are on the sex chromosomes X and Y
9
Q
Autosome
A
all chromosomes apart from sex chromosmes
10
Q
human chromosomes
A
46
11
Q
where does autosomal linkage occur
A
when genes are on the same chromosome
12
Q
epistasis
A
expression of one gene is influenced by the expression of another
