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 "

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Biology - 12th Class Biology Chapter 22 Short Questions Preparation

Question # 1

Define linkage and give its one disadvantage.

  • Ans 1: Phenomenon of staying together of all the genes of a chromosomes is called linkage.
    Its disadvantage is that,alleles cannot be assorted independently and no new recombinations are formed.

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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

Define linkage and give its one disadvantage.

  • Ans 1: Phenomenon of staying together of all the genes of a chromosomes is called linkage.
    Its disadvantage is that,alleles cannot be assorted independently and no new recombinations are formed.

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12th Class Biology Chapter 22 Short Questions Preparation - Set 2

Question # 1

What are multiple alleles,give its example?

  • Ans 1: When a gene exists in more than two alternate forms called multiple alleles.Blood group ABO is an example of multiple alleles.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 3

Question # 1

Explain genic system for determination of sex.

  • Ans 1: Many species of eukaryotic micro-organisms like yeast do not have sex chromosomes.These depend on genic system for determination of sex.In this system the sexes are specified by simple allelic differences at small number of gene loci.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 4

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 Preparation - Set 5

Question # 1

Differentiate between tritanopia and deutranopia.

  • Ans 1: Tritanopia: Tritanopia is blue colour blindness.
  • Ans 2: Deuteranopia: Deuteronopia is green blindness.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 6

Question # 1

What is Mody?Write its causes.

  • Ans 1: About 2 to 5% of type II diabetics get the disease early in the life before 25 year of age.It is called maturity onset diabetes of the young(Mody).Mody can be inherited as an autosomal dominant trait.
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12th Class Biology Chapter 22 Short Questions

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