BIO342H5 Lecture Notes - Lecture 17: Industrial Revolution, Chromosome
Document Summary
In some systems there may not be any deviation to fix ratios to 1:1. Y chromosomes do not recombine- ie accumulate deleterious mutations, so female bias sex ratio (cid:1) Why males and females look different from one other females are limited by number of eggs- more investment into fitness, not limited by number of eggs. Eg: rough skin mute- the three on outside are males competing for female (cid:1) (cid:1) (cid:1) Vs females- all of them get at least one mate, mostly 2. Avg male produces way little offspring, most don"t produce any offspring (cid:1) (cid:1) Whereas females- all of them do produce some offspring 50-350. We expect the fitness of males to be more limited by the number of mates they get compared to females (cid:1) Males: number of offspring inc with number of mates, much greater correlation than seen in female graph (cid:1)
