NATS 1675 Lecture Notes - Lecture 8: Hinny, Reproductive Isolation, Zygosity

• School: York University
• Department: Natural Science
• Course: NATS 1675
• Professor: Robert Crippen

Document Summary

Populations of organisms that retain their individuality in nature because they are reproductively isolated from other species around them. Reproductive isolation includes both behaviour and genetics. Sperm contains one half of blueprint, egg contains other half. There are number of instances where different species mate and they can make offspring (hybrids) Hybrid- organism produced from 2different species or genotypes, example could be female horse and (cid:373)ale do(cid:374)ke(cid:455) maki(cid:374)g a (cid:373)ule, (cid:373)ale horse a(cid:374)d fe(cid:373)ale do(cid:374)ke(cid:455) . Hybrids are usually incapable of reproduction themselves. Genotype- the genetic makeup of an organism, ex. Rr, rr, or rr; the combination of alleles at a particular locus, or all loci (types of genes, type of genes you have for a trait) Phenotype- the appearance of an organism with regard to an inherited characteristic (trait) or all inherited characteristics. The phenotype is produced with the genotype in cooperation with the environment, ex.