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

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Biology - 12th Class Biology Chapter 22 Short Questions Preparation

Question # 1

How does ABO incompatibility protect the developing baby against Rh-

  • Ans 1: Incompatiability
    Rh sensitization of Rh mother can be easily avoided If mother is given an injection of Rh antiserum during early pregnancy and immediately after birth.
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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

How does ABO incompatibility protect the developing baby against Rh-

  • Ans 1: Incompatiability
    Rh sensitization of Rh mother can be easily avoided If mother is given an injection of Rh antiserum during early pregnancy and immediately after birth.
Submit

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

Question # 1

Define product rule and pseudoautosomal genes.

  • Ans 1: The genes which are located both on x and y chromosomes are called x and y linked genes or pseudoautosomal genes because their pattern of inheritance is like autosomal genes.
  • Ans 2: Product rule: When we multiply probabilities of two different event,this phenomenon is called product rule.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 3

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 Preparation - Set 4

Question # 1

Differentiate between multiple alleles and polygenes..

  • Ans 1: Multiple alleles: If a gene has more than two alternate forms these are called multiple alleles.For example alleles for ABO blood group. E.g,alleles for ABO blood group.
  • Ans 2: Polygenes: When a continuously varying trait is controlled by alleles for two or more than two different gene pairs found at different loci,all influencing the same trait in an additive way,such genes are called polygenes, e.g,genes for controlling skin and eye colour in human.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 5

Question # 1

Compare between epistasis and poleiotropy.

  • Ans 1: Epistasis: When an effect caused by a gene pair on one locus interferes with or hides the effect caused by another gene or gene pair at another locus,it is called epistasis.
  • Ans 2: Poleiotropy: When a single gene affects two of more traits,the phenomenon is called pleiotropy.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 6

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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22th Chapter

12th Class Biology Chapter 22 Short Questions

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