Biology Practice Problems Meiosis Practice Problems Solution: A hybrid allotetraploid plant (4n=60) was backcros...

Solution: A hybrid allotetraploid plant (4n=60) was backcrossed to one of the suspected parents (2n=30). WHen the F1 underwent meiosis, the prophase chromosome configuration (where you see synapsis/pairing of homlogs) was examined under a microscope. What would you expect the chromosome configuration to look like?A. 45 singlesB. 15 pairs and 15 singlesC. 30 pairs and 15 singlesD. 60 singlesE. 30 pairs

Problem

A hybrid allotetraploid plant (4n=60) was backcrossed to one of the suspected parents (2n=30). WHen the F1 underwent meiosis, the prophase chromosome configuration (where you see synapsis/pairing of homlogs) was examined under a microscope. What would you expect the chromosome configuration to look like?

A. 45 singles

B. 15 pairs and 15 singles

C. 30 pairs and 15 singles

D. 60 singles

E. 30 pairs

Solution

Fertilization is the union of two gametes resulting in the formation of the zygote. For eukaryotes, the gametes that will be passed on from parents are products of meiosis, which basically reduces the number of chromosomes from each parent by half. These chromosomes would then pair up with their homologs in an attempt to re-establish the ploidy character of the parents.

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