Genetic inheritance Flashcards
1
Q
Genotype
A
Alleles a organism has for a particular characteristic
2
Q
Phenotype
A
Visible characteristics of an organism which occur as a result of genes
3
Q
Mutation
A
Change in a gene or chromosome. Can be caused by ionising radiation, chemical mutagen or just random chance.
4
Q
Natural selection
A
Survival of the fittest- The adapted species will survive better and pass on genes.
5
Q
Dominant and recessive alleles
A
Dominant - 2 dominant or 1 Dominant, they always take charge. They define the characteristics
Recessive - Will only change things if there are two of them. They go in pairs
6
Q
Homozygous
A
2 alleles that are the same
7
Q
Heterozygous
A
2 Different alleles
8
Q
Blood type genes
A
The gene controlling human ABO blood groups has 3 alleles, instead of just 2.
They are :Ia, Io, Ib IA or IA/IO = A IB = B IAIB = AB IO = O
