Asked by Jeanet Garcia on May 06, 2024
Verified
Due to a recessively inherited trait, some plants fail to produce chlorophyll and therefore are white rather than green. If we locate a pea plant that is heterozygous for this trait, self-pollinate it, harvest the seeds, and then plant the seeds, what are the likely phenotypes of the resulting offspring?
A) 100% green
B) 100% white
C) approximately 1/2 green and 1/2 white
D) approximately 1/4 white and 3/4 green
E) approximately 1/4 green and 3/4 white
Recessively Inherited Trait
A genetic characteristic that is expressed in an organism only when two recessive alleles for the trait are inherited, one from each parent.
Chlorophyll
Green photosynthetic pigment of algae and plants that absorbs solar energy; occurs as chlorophyll a and chlorophyll b.
Phenotypes
The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.
- Scrutinize the genotypic and phenotypic ratios derived from the processes of monohybrid and dihybrid crosses.
Verified Answer
PP and Pp genotypes will have chlorophyll production and appear green. Only the pp genotype will not produce chlorophyll and appear white. The probability of getting pp genotype is 1/4 or 25%.
Therefore, the likely phenotypes of the offspring would be approximately 1/4 white and 3/4 green.
Learning Objectives
- Scrutinize the genotypic and phenotypic ratios derived from the processes of monohybrid and dihybrid crosses.
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