| 1. | A zygote which has an X-chromosome inherited from the father will develop into a ? | |
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either boy or girl
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X-chromosome does not influence the sex of a child
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girl
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boy
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Report Question| 2. | What does the progeny of a tall plant with round seeds and a short plant with wrinkled seeds look like ? | |
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All are short with wrinkled seeds.
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All are tall with round seeds.
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All are tall with wrinkled seeds.
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All are short with round seeds.
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| 3. | Which one of the following pairs are homologous organs ? | |
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Wings of a bat and wings of a cockroach.
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Forelimbs of a bird and wings of a bat.
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Pectoral fins of a fish and forelimbs of a horse.
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Wings of a bird and wings of a butterfly.
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| 4. | The sex of a child is determined by which of the following ? | |
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The presence of and X chromosome in an ovum
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The presence of a Y chromosome in a sperm
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The length of time between ovulation and copulation
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The length of the mother’s pregnancy
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| 5. | When an individual is having both the alleles of contrasting characters it is said to be ? | |
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Linked genes
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Monoecious
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Heterozygous
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Dioecious
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| 6. | Forelimb of frog, lizard, bird and man has some evolutionary relationship. This are ? | |
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Hand relationship
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Analogous organs
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Homologous organs
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Missing links
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| 7. | Those organs which have different basic structure but have similar appearance and perform similar functions are called ? | |
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Vestigial organs
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Homologous organs
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Analogous organs
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None of these
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| 8. | A man with blood group A marries a woman having blood group O. What will be the blood group of the child ? | |
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A only
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AB
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Equal chance of acquiring blood group A or blood group O.
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O only
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| 9. | Which of the following decides the sex of the child ? | |
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female gamete, i.e., ovum
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mother
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male gamete, i.e., sperm
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both sperm and ovum
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| 10. | The theory of evolution of species by natural selection was given by ? | |
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Weismann
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Lamarck
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Darwin
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Mendel
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