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

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Biology - 12th Class Biology Chapter 22 Short Questions Preparation

Question # 1

Define SRY gene.

  • Ans 1: SRY stands for sexual determining region of y.It is the part of Y-chromosomes in human males which is responsible for male characters of maleness.
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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 SRY gene.

  • Ans 1: SRY stands for sexual determining region of y.It is the part of Y-chromosomes in human males which is responsible for male characters of maleness.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 2

Question # 1

Differentiate between linkage and linkage group.

  • Ans 1: Linkage: linkage is a phenomenon in which all the genes on a chromosomes stay together is called linkage.
  • Ans 2: Linkage group: The genes which are present on a chromosome from a block and these genes atay together is called linkage group.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 3

Question # 1

What is the product rule?

  • Ans 1: When two independent events are occurring simultaneously like in dihybrid cross,the ratio of each joint phenotypic combination can be obtained by multiplying the probabilities of individual phenotypes. It is called product rule.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 4

Question # 1

How sex is determined in yeast?

  • Ans 1: Sex determination in yeast depends upon genic system.In this system the sexes are determined by simple allelic difference at a small number of gene loci e.g,a and a are the two mating types or sexes of yeast controlled by MAT a and MAT.a alleles respectively.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 5

Question # 1

Define recombination frequency.Give an example.

  • Ans 1: It is the proportion of recombinant type between two gene pairs as compared to sum of all combinations.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 6

Question # 1

Differentiate between homogametic and heterogametic organism.

  • Ans 1: Homogametic organism: When an organism produce all the gametes of same type it is called homogametic.
  • Ans 2: Heterogametic organism:If an organism produce gametes of different type it is called heterogametic.
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12th Class Biology Chapter 22 Short Questions

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