Inheritance and Variation — Important Questions
Maharashtra Board · Class 12 · Biology
45 important questions from Inheritance and Variation for Maharashtra Board Class 12 Biology, with answers. Written for the board exams 2027.
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Important Questions from Inheritance and Variation
Which of the following are examples of contrasting traits studied by Mendel in pea plants?
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Round vs Wrinkled seeds, Yellow vs Green seeds, Tall vs Dwarf plants, Purple vs White flowers
Mendel studied seven pairs of contrasting traits in pea plants including seed shape (round vs wrinkled), seed color (yellow vs green), plant height (tall vs dwarf), and flower color (purple vs white). Large vs small flowers was not among the traits he studied.
In incomplete dominance, what happens when red flowers (RR) are crossed with white flowers (WW)?
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All pink flowers
In incomplete dominance, neither allele is completely dominant. When red (RR) is crossed with white (WW), all F1 offspring are RW showing an intermediate pink phenotype.
Which type of inheritance shows a 1:2:1 phenotypic ratio in F2 generation?
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Incomplete dominance
In incomplete dominance, the F2 generation shows 1:2:1 phenotypic ratio (1 parental type : 2 intermediate : 1 parental type) because the genotypic and phenotypic ratios are the same.
How many chromosomes are present in human somatic cells?
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46
Human somatic cells are diploid and contain 46 chromosomes (23 pairs). This includes 22 pairs of autosomes and 1 pair of sex chromosomes.
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