In the past, a diploid banana plant (n=11) produced an \"unreduced\" gamete. Thi

Question

In the past, a diploid banana plant (n=11) produced an "unreduced" gamete. This unusual, diploid gamete as fertilized by a normal gamete. Imagine that you were to examine cells from the resulting (live!) offspring. For full credit, EXPLAIN your reasoning.

A. How many chromosomes would you expect to see in a somatic (i.e., non-reproductive) cell?

B. How many chromosomes would you expect to see in a prophase I cell?

C. How many chromosomes would you expect to see in a mature gamete?

D. What reproductive consequences, if any, would you predict?

Explanation / Answer

A. How many chromosomes would you expect to see in a somatic (i.e., non-reproductive) cell?
The answer 33 (22 from non reduced gamete and 11 from nomral gamete)

B. How many chromosomes would you expect to see in a prophase I cell?
During Anaphase I the chromsome number reduced because of chormosome segreagation, so as this stage is after prophase I, the cell which in prophase I contians the same chromosome number as somatic cell. So, the chromosome number here is 33.

C. How many chromosomes would you expect to see in a mature gamete?
As the gametes has half of the chromosome of number of nomral complementation, there is a chance of cells with 16 and 17 chromosomes.

D. What reproductive consequences, if any, would you predict?
Due to this there is a chance of aneuploid plants.

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