Lecture 16 - Mendel's first law - segregation

Question 1

what was Mendel’s method of looking at inheritance?

Answer 1

1) P - parents from two ‘pure breeding’ lines are crossed
2) f1 - first filial generation
- phenotype scored then self-fertilised
3) f2 - second generation
- phenotype scored
4) also made ‘test crosses’
- f1 x P

Question 2

what are mendel’s principles?

Answer 2

Dominance
> phenotypes depend on inheritance of dominant and recessive alleles
Segregation
> the two alleles separate from each other in the gametes
Independent assortment
> genes segregate independently when gametes are formed