In Mendel\'s pea plants, purple flowers is dominant to white flowers. In your ga
ID: 132937 • Letter: I
Question
In Mendel's pea plants, purple flowers is dominant to white flowers. In your garden you have a purphe flower pea plant but you are unsure of its genotype. How would you determine the plant's genotype? O Since the purple flower plant was found naturally in your garden t must not be true-breeding so its genotype is heterozygous. O By performing a testcross to a white flower plant. Since it expresses the dominant trait it must be homozygous dominant ® By performing a monohybrid cross which should give the phenotypic ratio of 3:1.Explanation / Answer
The answer is b ( By performing test cross to a white flower plant)
Test cross involves the cross between an individual with the recessive phenotype.It is used to identify the genotype of the unknown individual.(whether it will be homozygous or heterozygous).
CROSS BETWEEN PURPLE AND WHITE
YY X yy = Yy ( all will be purple)
Yy X yy
If the genotype of the purple plant would have been YY than on performing test cross with white plant all the offspring would be purple.
while if the genotype of the purple would have been Yy than on performing test cross with white plant the ration of purple to white will be 1:1.
y y Y Yy ( purple ) Yy ( purple ) y yy (white) yy (white)Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.