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Title: If dad has attached earlobes and mom is heterozygous for unattached earlobes what phenotypes and genotypes can? Post by: microggc on Sep 25, 2012 Dad has attached earlobes and mom is heterozygous for unattached earlobes, what phenotypes and genotypes can i expect from the offspring?
Title: If dad has attached earlobes and mom is heterozygous for unattached earlobes what phenotypes and genotypes can? Post by: rl127 on Sep 25, 2012 I'm going to call the alleles U for Unattached and u for attached.
Since we know mother is heterozygous for unattached, we can assume that she is Uu. Since she actually has unattached, we can verify that unattached is dominant over attached. Dad is attached, and since attached is recessive, he has to be uu. Mom = Uu Dad = uu If you throw those two into a punnet square, you come out with ... U u u Uu uu u Uu uu Your genotypes are Uu and uu at a 1:1 ratio, and your phenotypes are attached and unattached at a 1:1 ratio. |