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Question
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.
Options
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.
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Solution
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.
RELATED QUESTIONS
Give Technical Term:
The ratio of offspring on F2 generation in a dihybrid cross.
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_______ is the ratio of dihybrid cross.
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Give a reason why only tall plants are observed in F1 progeny.
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Mendel's law of independent assortment is based on F2 ratio of:
