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

how can you calculate frequency between two linked genes?

  • Ans 1: Frequency between two linked genes can be calculated by the following formula
    Recombination frequency=Recombination type
    --------------------------* 100
    Sum of all combinations
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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 can you calculate frequency between two linked genes?

  • Ans 1: Frequency between two linked genes can be calculated by the following formula
    Recombination frequency=Recombination type
    --------------------------* 100
    Sum of all combinations
Submit

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

Question # 1

Differentiate between population & gene pool.

  • Ans 1: Population: Any group of interbreeding organisms of the same species that exist together in both time and space is called a population.e.g 100 diploid plants of pea in a field is an example of population.
  • Ans 2: Gene pool: All the genes or alleles found in a breeding population at a given time are collectively called the gene pool.e.g pea plants has white colors.There will be 100 genes(or 200 alleles) for flower color in gene pool.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 3

Question # 1

Differentiate between autosome and sex chromosomes.

  • Ans 1: Autosome chromosomes: Chromosomes which do not contain genes for sex determination or chromosomes other than sex chromosomes are called autosomes.
  • Ans 2: Sex chromosomes: Chromosomes which play role in sex determination are called sex chromosomes.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 4

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 5

Question # 1

Define crossing over.Give its importance.

  • Ans 1: Mendel devised a cross called test cross,which is used to test the genotype of an individual showing a dominant phenotype.It is a mating in which an individual showing a dominant phenotype is crossed with an individual showing its recessive phenotype.significance of test cross is it is used to check the homozygosity & heterozygosity of the dominant parent.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 6

Question # 1

Differentiate between gene and allele.

  • Ans 1: Gene: Gene is the basic unit of biological information.In fact DNA allstorts of biological information coded in the sequence of its bases in a linear order and genes are actually parts of DNA comprising its base sequences.
  • Ans 2: Allele: Genes form pairs on pairs of homologous chromosomes.One member of a gene pair is located on one homologue and the other homologue and the other member on the other homologue partners of a gene pair are called alleles.
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22th Chapter

12th Class Biology Chapter 22 Short Questions

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