Consider a diploid organism that has three pairs of chromosomes. Assume that the

Question

• Consider a diploid organism that has three pairs of chromosomes. Assume that the organism receives chromosome A, B and C from the female parent and A', B' and C' from the male parent. If no crossing over occurred:

1. How many different gametes could be produced in this organism?
2. What proportion of the gametes of this organism would be expected to contain all the chromosomes of maternal origin?
3. What proportion of the gametes would be expected to contain some chromosomes from both maternal and paternal origin?

Explanation / Answer

as it has 3 pairs chromosomes, it will produce 6 different gamets

4 gamets are expected to contain all the chromosomes of maternal origin

2 gamets are expected to contain all the chromosomes of both maternal and paternal origin

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