In humans, having extra fingers or toes is caused by a dominant allele (E). People with two recessive alleles have 5 fingers and toes on each hand or foot. a. What is the genotype of someone who has 5 fingers and toes on each hand or foot? b. What are the two different genotypes that someone with extra fingers or toes could have? c. If two people both had the normal number of fingers and toes, is there any chance that their children could inherit the allele for extra fingers and toes? Do a Punnett square and show your work.
In humans, having extra fingers or toes is caused by a dominant allele (E). People with two
recessive alleles have 5 fingers and toes on each hand or foot.
a. What is the genotype of someone who has 5 fingers and toes on each hand or foot?
b. What are the two different genotypes that someone with extra fingers or toes could
have?
c. If two people both had the normal number of fingers and toes, is there any chance that
their children could inherit the allele for extra fingers and toes? Do a Punnett square
and show your work.
d. If a man who was heterozygous for this gene married someone who was homozygous
for the recessive allele, what fraction of their children would you expect to have extra
fingers or toes? Do a Punnett square and show your work.
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