In a population the offspring produced tend to be 60% female

Last updated: 7/8/2022

In a population the offspring produced tend to be 60% female and 40% male. This bias in sex ratio was investigated and it was found that an allele of a gene in the Y chromosome caused sperm that carried this allele to be less effective at fertilizing eggs. This led to sperm that carried Y chromosomes to be slightly less effective at fertilization compared to sperm cells with the X chromosome, explaining the uneven sex ratio. This is an example of: a. Good genes model b. Meiotic drive c. Reinforcement d. Genetic hitchhiking e. Pre-zygotic barrier to speciation