Monday, May 11, 2009

A homozygous dominant snapdragon flower is red.?

A homozygous dominant snapdragon flower is red. The homozygous recessive flower is white. The heterozygous flower is pink. What is this an example of???

A homozygous dominant snapdragon flower is red.?
incomplete dominance.





if you have RR (red) x rr (white) all the offspring will be Rr (pink)


So you have 2 alleles, 3 genotypes and 3 phenotypes....not like complete dominace where there is 2 alleles, 3 genotypes and 2 phenotypes ( dominant and recessive)...in this case there is a mixed or blended (Rr) possiblity.
Reply:Incomplete dominance





This is where two alleles of a gene which result in both of the alleles being expressed in the phenotype.





For example: In your examples, if one allele is for red flowers and the other allele is for white flowers, then the individual will inherit a blend of the two alleles and have pink flowers.

Toothpaste

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