6. Cheetahs are an endangered species in their native Africa, so a captive-breed

Question

6. Cheetahs are an endangered species in their native Africa, so a captive-breeding program has been established. Zoos have had difficulty interbreeding Cheetahs fr Namibi and Kenya even though these matings produce normal hybrid Cheetahs. T hybrid Cheetahs frequently fail to carry a fetus to term and miscarry. Analysis of N and Kenya populations of Cheetahs show the following differences. Letter represer genes or regions of the chromosomes. As always A and a are homologous. Namibian Cheetahs Kenyan Cheetahs a. Describe the chromosomal differences in the two populations. (2 points) same b. Why are Hybrid Cheetahs phenotypically normal? (2 poin Maso lilustrate the 6 types of gametes formed by Hybrid Cheetahs (6 points)

Explanation / Answer

A. They undergoes recriprocal translocation. The exchange happen between B and D of two different chromosome.

B. In hybrid cheetahs are normal because it contains all the parts of the chromosomes. It is balanced recriorocal translocation so there is no loss or gain of genetic information.

C. In hybrid cheetahs has following pairs of chromosomes
      A    B   and D
      a    d       b

Gametes are
1 A      B      2. A    B              3. a     d               4. a    d
     D                          b                        D          b

5.   A      B     6. D
     a      d        b

D. Even though it is balanced transloctation cells divide to create an egg or sperm cells for reproduction, the cells can end up with extra genetic material or missing genetic material, which could lead to miscarriage

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