GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
For monohybrid experiments, a testcross could result in which of the following ratios?
|
|
1:1
|
|
|
2:1
|
|
|
9:3:3:1
|
|
|
1:2:1
|
|
|
3:1
|
Explanation:
Detailed explanation-1: -In the monohybrid cross, a testcross of a heterozygous individual resulted in a 1:1 ratio.
Detailed explanation-2: -Final answer: The genotypic and phenotypic ratio of the monohybrid test cross is 1:1.
Detailed explanation-3: -In the given case, the crossing of RrYy (dihybrid) with rryy (homozygous recessive parent) gives 1:1:1:1 phenotypic ratio and 1:1:1:1 genotypic ratio. So, the correct answer is option “D” that is Ratio 1: 1: 1: 1 is obtained from a cross of RrYy x rryy.
Detailed explanation-4: -What is a 1:1 phenotypic ratio? A 1:1 phenotypic ratio occurs when there are only two phenotype possibilities as outcomes when organisms are crossed and they both have a 50/50 chance of appearing.
There is 1 question to complete.