By Heather Root and Amber Snow

No way to predict the combinations of genes in a gamete

Sex-linked, sex-limited, and sex-influenced

There are multiple traits that need to be considered when mating animals

The female genotype is XX and the male is XY

The sex of an animal may determine whether a gene is dominant or recessive

Modes of gene expression differ between males and females

Phenotypic expression is limited to one sex

Traits that are affected by only a few genes ex. Coat, color, horns

Affected by many genes with no gene having an occurring influence ex. Growth rate

Polygenic traits are more important