Genetics Flashcards
(13 cards)
1
Q
Genotype
A
the genetic constitution of an
organism
2
Q
Phenotype
A
- the expression of the genetic
constitution - and its interaction with the
environment
3
Q
Homozygous
A
two copies of the same allele for
a gene
4
Q
Heterozygous
A
two different alleles for the
same gene.
5
Q
Recessive allele
A
An allele that is only expressed
if there are no dominant alleles
present
6
Q
Dominant allele
A
An allele that is always
expressed in the phenotype
7
Q
Codominance
A
- two alleles are both dominant
- both are expressed in the
phenotype
8
Q
Multiple alleles
A
More than two alleles for a gene
9
Q
Sex-linkage
A
- a gene located on the X
chromosome - in the non-homologous region
10
Q
Autosomal
linkage
A
genes located on
the same
chromosome
(not the X or Y
chromosome)
11
Q
Epistasis
A
When one gene masks/modifies
the expression of another gene
at a different locus
12
Q
Monohybrid
A
A genetic cross for the
inheritance of one gene
13
Q
Dihybrid
A
A genetic cross for the
inheritance of two genes
