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Unformatted text preview: Sometimes there is co-dominance like in blood: can be A, B, O, or AB Law of independent assortment chromosomes are reduced in half, first pair Question: Why is independent assortment important? Because it creates variation Single-factor cross Steps o Assign a symbol for each allele o Determine the genotype of each parent and indicate a mating o Determine all the possible kinds of gametes each parent can produce o Determine all the gene combinations that can result when these gametes unite o Determine the phenotype of each possible gene combination IeRrLl Genes: Color, Ligule Alleles R= Red, r=colorless and L=ligule, l = liguless true-breeding = homozygous (ie. RR or rr) RRll x rrLL How many gametes can be formed from this? AaBbCcDD 2 to the n power when n = heterozygous genes So, 2x2x2 = 8 The way to test for sex-linkage is to switch roles and look at the results....
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