BIO2242 Lecture Notes - Lecture 16: Dioecy, Sex-Determination System, Gonochorism
Document Summary
Getting genetic contribution from mother and father for the offspring. Gametes need to be at the same place at the same time = needed for fertilization to occur. It alters the genetic material in the offspring so its not identical to their parents. Get the parent dividing its chromosomes = segregation. Crossing over occurs = where some material from paternal chromosome crosses over to the maternal side, and vice versa. Forms of sexual reproduction: gonochoristic = male and female functions by separate individuals. Hermaphroditic = both roles played by same individual. sequential = since from one role to another. Internal and external fertilization is not the types of sexual reproduction. Xy = male genotypic sex determination = where genetic material determines whether you"re male/female = occur mainly in vertebrates. Environmental sex determination = where some aspect of external environment contributes to whether you"re male/female (temperature). The temp at which the eggs were incubated at determines the sex of the offspring.