Polyploids are often said to be conservative in the evolutio

Polyploids are often said to be conservative in the evolutionary sense; that is. they do not allow the phenotypic expression of mutant recessive alleles. In allopolyploids, for example, this would be true for recessives of functionally identical genes, one pair in each of the different genomes. What are the reasons for this? Illustrate your answer with an example from an autotetraploid or an allotetraploid and compare the results with those expected of a diploid.

Solution

Actualy polypoids will contain more than two pairs of same chromosomes.the cosequence of plypoidal is that a pertile seed from an apple or a potato plant will not resemble its parents when it grows up.

But in allopolyploids have several chromosomes sets are derived from more than one species.so,in allopolyploid allow it resemble its parents when it groen up.so, this would be true for recessive of functionally identical genes, one pair in each of the different genomes.