Search Results
ID: 9d1Brb5r/pol/508483255#508488900
6/23/2025, 8:49:49 PM
>>508487665
Recessive alleles are actually the ones that persist longest.
Because all things being equal and in the simplest case of a binary-sexed diploid, they are the target of selection in 25% of the offspring, while the dominant alleles are targeted by selection in 75% of the offspring.
So in this case, the selective pressure on the dominant allele is 3 times the selective pressure on the recessive allele.
To try and enforce homozygous recessives - THAT is how you lose the recessive alleles.
Anyone can try this at home. Crossbreed a green-seeded pea and a yellow-seeded pea, and then take the resultant seed, split them into 2 equal batches, and try to get one to be purely green-seeded, and the other purely yellow-seeded.
It will only take you 2 generations for the former, and you may not live long enough to achieve the latter.
Recessive alleles are actually the ones that persist longest.
Because all things being equal and in the simplest case of a binary-sexed diploid, they are the target of selection in 25% of the offspring, while the dominant alleles are targeted by selection in 75% of the offspring.
So in this case, the selective pressure on the dominant allele is 3 times the selective pressure on the recessive allele.
To try and enforce homozygous recessives - THAT is how you lose the recessive alleles.
Anyone can try this at home. Crossbreed a green-seeded pea and a yellow-seeded pea, and then take the resultant seed, split them into 2 equal batches, and try to get one to be purely green-seeded, and the other purely yellow-seeded.
It will only take you 2 generations for the former, and you may not live long enough to achieve the latter.
Page 1