Heredity — Practice Quiz
Gujarat Board · Class 10 · Science
Try a 4-question quiz on Heredity for Gujarat Board Class 10 Science: tap an answer to check it and see why. 44 questions in the full chapter test.
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Quick Quiz: Heredity
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What is the term used for the different forms of a gene that control the same trait?
In Mendel's experiments with pea plants, which trait was dominant when he crossed tall plants with short plants?
What is the ratio of tall to short plants in the F2 generation when two heterozygous tall plants (Tt) are crossed?
How many pairs of chromosomes do humans have?
Sample Questions
Which of the following statements about dominant and recessive traits are correct?
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Dominant traits are expressed even with one copy of the allele, Recessive traits need two copies of the allele to be expressed, A single gene can have both dominant and recessive alleles
Dominant traits are expressed when at least one dominant allele is present (TT or Tt). Recessive traits are only expressed when both alleles are recessive (tt). Dominant traits are not necessarily more common, and recessive traits are not necessarily harmful.
Which of the following represent the sex chromosomes in human males and females?
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Males have XY chromosomes, Females have XX chromosomes, The Y chromosome is smaller than the X chromosome
In humans, females have two X chromosomes (XX) and males have one X and one Y chromosome (XY). The Y chromosome is much smaller than the X chromosome and carries fewer genes.
Who determines the sex of a child in humans?
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Father only
The father determines the sex of the child because mothers always contribute an X chromosome, while fathers can contribute either an X (resulting in a girl) or a Y chromosome (resulting in a boy).
What happens in the F1 generation when a pure tall plant (TT) is crossed with a pure short plant (tt)?
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All plants are tall
When a pure tall plant (TT) is crossed with a pure short plant (tt), all F1 offspring have the genotype Tt. Since T is dominant over t, all F1 plants are tall.
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