Many of an organism's traits (____) are determined by the organism's genes ____, which are passed from one generation to the next. Each ____ copy may have different types called ____ If present, ____ alleles are expressed, but ____ alleles are only seen if the dominant allele is absent. If you cross two ____ parents, there will be two ____ offspring in the Punnett square. In the ABO blood group, the A and B alleles are ____ while the O is ____ . Therefore someone with the genotype Ao would have type A blood. If a person has a trait and their parents do not, the trait is ____ . If a trait is ____ , at least one parent of an affected individual will have the trait. If two parents are homozygous, one brown and one white, their offspring will be ____ if the color trait is inherited by incomplete dominance. If two parents are purebred, one tall and one short, their offspring will be ____ if the trait for height is inherited by complete dominance. With incomplete dominance, if you breed two of the heterozygous F1 generation, the genotypic ratio of their offspring will be ____ and their phenotypic ratio will be 1:2:1. If a woman has a sex-linked, recessive trait, ____ of her sons will express the trait and her ____ had to have the trait.

Modes of inheritance

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