CBSE Class 10 Chapter 8 Heredity MCQs
Check below the MCQ Questions for class 10 Science with answers and Clear your idea of Heredity.
Q.1. Refer to the given figure showing a cross between a tall and a short variety of a plant species.
The genotypic ratio of different traits that would result in F2 generation will be
(a) 1: 2 : 1 (b) 2: 2
(c) 1 : 3 (d) 3: 1
Answer
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Q.2. Which one of Mendel’s law states that when two homozygous individuals with one or more sets of contrasting characteristics are crossed, the characteristics which appear in F1 hybrids are dominant and those which do not are recessive?
(a) Law of segregation
(b) Law of dominance
(c) Law of independent assortment
(d) None of these
Answer
Q.3. In an experiment with pea plant, one tall plant was crossed with one dwarf plant. The resultant progeny obtained were 50% tall and 50% dwarf. What could be the genotype of parental plants?
(a) Tt, Tt (b) TT, tt
(c) Tt, tt (d) tt, tt
Answer
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Q.4. In an experiment, showing Mendelian inheritance, a tall pea plant with purple flowers was crossed with short pea plant with white flowers. All the progeny in the next generation was seen to have purple flowers but half of them were short. What will be the genetic makeup of tall parent?
(a) TTPP (b) TtPP
(c) TTpp (d) TtPp
Answer
Q.5. What determines the sex of a child?
(a) Chromosome content of the ovum
(b) Chromosome content of the sperm
(c) Number of days between ovulation and fertilisation
(d) Number of days between fertilisation and implantation
Answer
Q.6. The parental genotypes are X. The probability of having genotype in the F1 generation is
(a) 25% (b) 50%
(c) 75% (d) 0%
Answer
Q.7. The information source for making proteins in the cell is the
(a) chromosome (b) DNA
(c) enzyme (d) nucleus
Answer
Q.8. Who among the following is considered as the father of Genetics?
(a) Mendel
(b) Morgan
(c) Sutton
(d) Boveri
Answer
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Q.9. A recessive homozygotes is crossed with a heterozygote of the same gene. What will be the phenotype of the F1 generation?
(a) All dominant (b) 75% dominant, 25% recessive
(c) 50% dominant, 50% recessive (d) 25% dominant, 50% heterozygous, 25% recessive
Answer
Q.10. What will be the percentage of purple-stemmed plants in the F2 generation, when the F1 generation resulted due to cross breeding of the green stemmed (GG) tomato plants with purple stemmed (gg) tomato plants, are self pollinated?
(a) 10%
(b) 25%
(c) 75%
(d) 50%
Answer
We hope the MCQs for the CBSE Class 10 Science Chapter 8 on Heredity are helpful for your board exam preparation.
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