Same chapter4 marksDifficulty: Hard
In a dihybrid cross between plants with round yellow seeds (RRYY) and wrinkled green seeds (rryy), give the F1 and the phenotypic ratio of the F2.
Genetics
4 marksDifficulty: Hard
A man with blood group AB marries a woman with blood group O. State the blood groups possible in their children and explain.
Original Khojo Papers practice question — not from a past board paper.
Answer
The children can be of group A or group B, but not AB or O.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The man is IAIB and gives either IA or IB. The woman is ii and gives i. The children are therefore IAi, group A, or IBi, group B.
Related questions
From the same topic and chapter, at a similar level.
Same chapter4 marksDifficulty: Hard
Using a Punnett square, work out the offspring of a cross between two heterozygous tall pea plants, and give the phenotypic and genotypic ratios.
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Same chapter3 marksDifficulty: Medium
Explain sex determination in human beings.
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Same chapter2 marksDifficulty: Easy
State Mendel's law of segregation.
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Same chapter3 marksDifficulty: Medium
State Mendel's law of independent assortment and name the cross that demonstrates it.
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Same chapter2 marksDifficulty: Easy
Define the terms genotype and phenotype.
Genetics