To determine how old Neandertal fossils are, researchers must use radiometric dating. They use an isotope with a half-life of 12,000 years, and find that fossils from one Neandertal have 1/256th (=1/28) of the isotope found in currently living organisms. How old would you predict these Neandertal fossils to be?

96000YEARS

Explanation:

Given that 1/28 = 8 half lives

this means that 8 half lives ,

and the given fossil should have 1/28 of the isotope

8 half lives = 1200 x 8

= 96000years

therefore  the predicted Neandertal fossils is 96000years

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

the correct answer is sex-linked recessive.

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