ch7 inheritance Flashcards
1
Q
locus
A
the position of a gene on a chromosome
2
Q
phenotype
A
observable characteristic, determined by the genotype and environmental factors
2
Q
genotype
A
the genetic makeup of an organism, consisting of the specific alleles inherited from each parent
3
Q
homozygous
A
-both alleles code for the same information
-pure breeding
3
Q
heterozygous
A
two alleles are different
4
Q
hemizygous
A
males have only one allele for traits carried on either sex chromosomes
5
Q
polygenic traits
A
-when traits are controlled by more than one gene.
-e.g. hair and eye colour
6
Q
epigenetics
A
when DNA is modified during a persons lifetime
- the DNA can be methylated
a methyl group is added to the DNA and this stops the gene being expressed.
6
Q
A
7
Q
A
