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

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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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 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 2

Question # 1

What is XO-XX mechanism of sex determination?

  • Ans 1: This pattern of Inheritance is found in grasshopper and protenor bug.Male is XO because male has one x chromosomes,the other x chromosomes is missing and female is xx,it is homogametic because it forms all gametes of same type with one X chromosome.Male is heterogametic because it forms two types sperms: half sperms have X chromosomes and other half are without X chromosomes.
    When sperm with X chromosomes is fused with an egg having X chromosomes female offspring is produced and when sperms without X chromosomes is fused with egg then male offspring will be produced.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 3

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 4

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 5

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.
Submit

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.
Submit

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12th Class Biology Chapter 22 Short Questions

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