12th Class Fsc Biology Online Preparation for chapter 22 (Variation and Genetics)

Online Short Questions For Chapter 8 "12th Class Biology Chapter 22 Short Questions Preparation "

Try The Short Questions For 12th Class Biology Chapter 22 Short Questions Preparation

  • Total Questions10

  • Available Sets6

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Biology - 12th Class Biology Chapter 22 Short Questions Preparation

Question # 1

What is erythroblastosis foetalis?

  • Ans 1: Due to maternal-fetal Rh incompatibility,there is destruction of fetal RBCs,and fetus become anemic,The anemic fetus starts to release many immature erythroblasts into his blood stream.That is why this hemolytic diseases of new borne is called erythroblastosis foetalis.
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Prepare Complete Set Wise Questions For Chapter 8 "12th Class Biology Chapter 22 Short Questions Preparation "

12th Class Biology Chapter 22 Short Questions Preparation - Set 1

Question # 1

What is erythroblastosis foetalis?

  • Ans 1: Due to maternal-fetal Rh incompatibility,there is destruction of fetal RBCs,and fetus become anemic,The anemic fetus starts to release many immature erythroblasts into his blood stream.That is why this hemolytic diseases of new borne is called erythroblastosis foetalis.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 2

Question # 1

Differentiate between homozygous and heterozygous.

  • Ans 1: Homozygous: If alleles of a gene pair are in similar from they are called homozygous.
  • Ans 2: Heterozygous: If the alleles of a gene pair are in different from they are called heterozygous.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 3

Question # 1

Give significance of test cross.

  • Ans 1: Mendel devised a cross called test cross,which is used to test the genotype of an individual showing a dominant phenotype.This cross finds out the homozygous or heterozygous nature of the genotype.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 4

Question # 1

What is tetrad?

  • Ans 1: Each pair of homologous chromosome which consists of four chromatids is called tetrad.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 5

Question # 1

In bird's the female is heterogametic. How?

  • Ans 1: In birds female is heterogametic because she produce two different types of gametes and sex of new borne is determined by the type of female gamete which fertilize the sperm.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 6

Question # 1

What is heterogametic individual?Give example.

  • Ans 1: Male grasshopper is XO because it has only one X chromosome.The other sex chromosome is missing entirely.Male is heterogametic because it forms two type of sperms,half the sperms have X chromosome while the other half are without any sex chromosome.
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12th Class Biology Chapter 22 Short Questions

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