If the elephant experienced a BRCA2 mutation in his sex cells that reduced the function of the associated BRCA2 enzyme, would you predict the mutant BRCA2 allele to act dominant or recessive when it's inherited by his elephant children? Why?
Added by Milagros C.
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Mutations in the BRCA2 gene can increase the risk of developing certain types of cancer, such as breast and ovarian cancer. Show more…
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Elephant tusk length is determined by a gene with two alleles (T and t). The more copies of T an individual has, the longer their tusks will grow. Sadly, due to the illegal ivory trade, large-tusked individuals are at greater risk of being killed by poachers. Only 0.90% of Tt individuals and only 0.62% of TT individuals survive to reproduce, while all of the tt individuals usually survive. In a newborn generation of elephants, the frequency of the T allele is 0.42. Given the selection coefficients above, what proportion of the offspring of this generation will be born with the TT genotype? Round your final answer to 2 decimal places.
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