3.7.1.1 Inheritance Flashcards
1
Q
Define dominant gene
A
An allele whose phenotype is always expressed
2
Q
Define recessive gene
A
An allele whose phenotype only appears if both copies of the gene are present
3
Q
Define carrier
A
A person carrying an allele which is not expressed in the phenotype but can be passed to offspring
4
Q
Define F1 generation
A
The offspring of 2 homozygous individuals (F1 gen will be heterozygous)
5
Q
Define F2 generation
A
The offspring of the F1 generation interbreeding
6
Q
Define monohybrid inheritance
A
The inheritance of a characteristic controlled by a single gene
7
Q
What is co-dominance? & example
A
- Both alleles are expressed in the phenotype
- No recessive alleles
- Given an intermediate phenotype
- e.g. Sickle cell anaemia
8
Q
What does multiple alleles mean?
A
Genes with more than 2 possible alleles within a population
9
Q
Define dihybrid inheritance
A
The simultaneous inheritance of two characteristics
