Genetics Question : part A) so if the question gave us homozygous dominant how w

Question

Genetics Question : part A) so if the question gave us homozygous dominant how would you approach this ? Please explain . 9) The diploid gekkonid lizard Gonatodes taniae from Venezuela has a somatic chromosome number of 16. Ifthe centromeres of the 8 homologous pairs are designated as Aa, Bb, Cc, Dd, Ee, Ff, Gg, and Hh: (a) How many different combinations of centromeres could be produced during meiosis? (b) What is the probability that a gamete will contain only those centromeres designated by capital letters?

Explanation / Answer

Answer:

(a)

Number of different gamete = 2^n, where n is the number of heterozygous alleles

Here AaBbCcDdEeFfGgHh, we have 8 heterozygous alleles

Therefore 2^8= 256 different combinations of centromeres are possible

(b)

Probability of AABBCCDDEEFFGGHH = ¼ x ¼ x ¼ x ¼ x ¼ x ¼ x ¼ x ¼ = 1/65536

Explanation: Probability of AA is 1/4 because Aa x Aa= AA, Aa, Aa, aa (where 1/4 is AA)

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