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 "

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Biology - 12th Class Biology Chapter 22 Short Questions Preparation

Question # 1

Differentiate between genotype and phenotype.

  • Ans 1: Genotype: Genotype is the genetic complement i.e the genes is an individual for a particular trait e.g"Rr" &"Rr" are alleles for red color."rr" are alleles for white colour.
  • Ans 2: Phenotype:"Phenotype" is the from of appearance of a trait in an organism".e.g Red and white flower colours are example of phenotype.
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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

Differentiate between genotype and phenotype.

  • Ans 1: Genotype: Genotype is the genetic complement i.e the genes is an individual for a particular trait e.g"Rr" &"Rr" are alleles for red color."rr" are alleles for white colour.
  • Ans 2: Phenotype:"Phenotype" is the from of appearance of a trait in an organism".e.g Red and white flower colours are example of phenotype.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 2

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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12th Class Biology Chapter 22 Short Questions Preparation - Set 3

Question # 1

What is nullo gametes?

  • Ans 1: A gamete without sex chromosomes is called nullo gamete.For Example Grasshopper male produce 50% nullo gametes and 50% with sex chromosomes.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 4

Question # 1

Define gene linkage and gene linkage groups.

  • Ans 1: Gene linkage: Gene linkage is the tendency of DNA sequences that are close together on a chromosomes to be inherited together during the meiosis phase of sexual reproduction.
  • Ans 2: Gene linkage groups: In genetics all of the genes on a single chromosome are inherited as a group i.e during cell division they act and move as unit rather than independently.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 5

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 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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12th Class Biology Chapter 22 Short Questions

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