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A diploid ornamental plant has a chromosome number (). During meiosis, each chromosome pair can assort independently, and for each pair, crossing over can produce four different recombinant chromatids. How many distinct haploid gamete combinations are possible?

hard 5 marks Class 12 · Biology · Sexual Reproduction in Flowering Plants
Answer
16384

The correct answer is 16384 — Thus, 16384 distinct gamete types are possible.

Step-by-step solution

  1. Each of the 7 chromosome pairs can assort independently – contributes 4 possible combinations per pair.
  2. For each pair, 4 recombinant chromatids are possible – factor of 4 per pair.
  3. Total combinations = because each pair’s options are independent.
  4. Compute .
  5. Thus, 16384 distinct gamete types are possible.
Common mistake: Calculating only 2^7 instead of 4^7

Concept tested: Independent assortment & crossing over

Published · How this solution was prepared and checked

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