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Biology · 2025 · 3 marks
CBSE 2025 · Region 4 · Set 1 · Q23
Gregor Mendel conducted hybridisation experiments in garden pea for seven years and proposed the law of inheritance. (a) Why was he successful in his…
Gregor Mendel conducted hybridisation experiments in garden pea for seven years and proposed the law of inheritance.
(a)
Why was he successful in his hybridisation experiments ? Give two reasons.
(b)
State the law of independent assortment as proposed by Mendel after his dihybrid crosses.
Marking-scheme solution
(a)
True breeding pea plant varieties were selected, distinct contrasting characters were selected for different traits, artificial (self and cross) pollination was conducted carefully, large sample size was used, results were confirmed by performing experiments for several generations
(b)
When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters.
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