Question

In a population, purple flowers are dominant over blue flowers. Determine which statement below is NOT correct.

A) Purple flowers and blue flowers can both be homozygous.
B) It is more of an advantage to the purple flower to be homozygous dominant. C) Purple flowers must be either Pp or PP.
D) Blue flowers must contain two recessive alleles.

Answer 1

Answer:

Explanation:

B. Heterogygous dominant

Answer 2

The correct answer is B) It is more of an advantage to the purple flower to be homozygous dominant.

Explanation:

• Purple flower is dominant over blue flower.
• According to Mendel's law of Dominance, of the two alleles in a diploid organism, the one which can express itself in both the homozygous and heterozygous condition is called the Dominant allele and the one which gets suppressed in presence of the dominant allele, but can express itself in homozygous condition is called the Recessive Allele.
• Let the dominant genotype be represented as P and recessive by p.
• The genotypes of the Purple flower can be PP or Pp.
• The genotype of the Blue flower will be pp.
• As the purple colour can express itself in homozygous (PP) or heterozygous (Pp) condition so it is more advantage to the purple flower to be heterozygous dominant (Pp).
• This is because in heterozygous dominant (Pp), even a single copy of the dominant allele can cause the expression of the dominant purple phenotype.