Advertisements
Advertisements
प्रश्न
Assertion: When the two genes in a dihybrid cross are situated on the same chromosome, the proportion of parental gene combinations is much higher than the nonparental type.
Reason: Higher parental gene combinations can be attributed to crossing over between two genes.
पर्याय
Both A and R are true and R is the correct explanation of A.
Both A and R are true and R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Advertisements
उत्तर
A is true but R is false.
Explanation:
Due to the decreased likelihood of crossing over, parental gene combinations occur more frequently than recombinant forms when two genes are on the same chromosome (linked genes). Higher parental gene combinations, however, result from linkage rather than crossing over. Instead of increasing parental kinds, crossing over increases recombinant types.
संबंधित प्रश्न
Two heterozygous parents are crossed. If the two loci are linked, what would be the distribution of phenotypic features in the F1 generation for a dihybrid cross?
Complete the following sentence with appropriate word:
_______ is the ratio of dihybrid cross.
Select the period for Mendel’s hybridization experiments
What is back cross?
Findings of Gregor Mendel were rediscovered by the following scientists EXCEPT for ______
In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that ______.
A normal green male maize is crossed with albino female. The progeny is albino because ______.
In a dihybrid cross, F2 phenotypic ratio is 13 : 3. It is case of ______.
Do genetic combination of mothers play a significant role in determining the sex of a new born?
