High School

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In elephants, the allele for small tusks (T) is dominant to the allele for large tusks (t). The allele for a long nose (N) is dominant to the allele for a short nose (n).

A bull elephant that is heterozygous for both traits can produce unique gametes containing which allele combinations?

1) TN
2) Tn
3) tN
4) tn

Answer :

Final answer:

A bull elephant that is heterozygous for both small tusks and long nose (TtNn) can produce four unique gametes: TN, Tn, TN, and tn.

Explanation:

In elephants, the allele for small tusks (T) is dominant to the allele for large tusks (t), and the allele for a long nose (N) is dominant to the allele for a short nose (n). When considering a bull elephant that is heterozygous for both of these traits (TtNn), we can determine the unique gametes it can produce through the concept of Mendelian inheritance.

Since the bull elephant is heterozygous for both traits, the possible gamete combinations it can produce are:

  1. TN
  2. Tn
  3. tN
  4. tn

These combinations arise from the random segregation of alleles during gamete formation, where each gamete will receive one allele for tusks and one allele for nose length.

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