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.
Genetics
4 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.
Original Khojo Papers practice question — not from a past board paper.
Answer
The F1 are all RrYy with round yellow seeds. The F2 show the ratio 9 round yellow : 3 round green : 3 wrinkled yellow : 1 wrinkled green.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The appearance of round green and wrinkled yellow plants in the F2 is the evidence for independent assortment.
Related questions
From the same topic and chapter, at a similar level.
Same chapter4 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.
Genetics
Same chapter3 marksDifficulty: Medium
Explain sex determination in human beings.
Genetics
Same chapter2 marksDifficulty: Easy
State Mendel's law of segregation.
Genetics
Same chapter3 marksDifficulty: Medium
State Mendel's law of independent assortment and name the cross that demonstrates it.
Genetics
Same chapter2 marksDifficulty: Easy
Define the terms genotype and phenotype.
Genetics