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

Assign the sex of the human having XO,XXX,XXY and XYY chromosomes.

  • Ans 1: Species XX XY XO XXY
    Human Female Male Male Male
    Drosophila Female Male Female Female
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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

Assign the sex of the human having XO,XXX,XXY and XYY chromosomes.

  • Ans 1: Species XX XY XO XXY
    Human Female Male Male Male
    Drosophila Female Male Female Female
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12th Class Biology Chapter 22 Short Questions Preparation - Set 2

Question # 1

What is law of segregation?

  • Ans 1: The two coexisting alleles for each trait in an individual segregate from each other at meiosis, so that each gamete has only one the two alleles.Alleles unite again random fertilization of gametes when zygote is formed.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 3

Question # 1

What are jumping genes?

  • Ans 1: Jumping genes do not reside peacefully on their loci; they keep on hopping on different loci on the same chromosomes or other chromosomes.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 4

Question # 1

State Law of independent assortment.

  • Ans 1: When two contrasting pairs of traits are followed in the same cross,their alleles are assorted independently into gametes.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 5

Question # 1

What are sex influenced traits?Give an example.

  • Ans 1: Sex influencing traits occurs in both males and females but more common in one sex.It is controlled by an allele that is dominant in one sex but recessive in other.The difference in expression is due hormonal difference in two sexes.E.g, patteren baldness is sex influenced trait.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 6

Question # 1

What is hypophosphatemic rickets?

  • Ans 1: It is an X linked dominant trait.It is rare hereditary disease.it does not result from vitamin D deficiency but its cause is a genetic communication failure at molecular level.The genes encoding bone proteins never receive vitamin D message to function.
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22th Chapter

12th Class Biology Chapter 22 Short Questions

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