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

What are multiple alleles,give its example?

  • Ans 1: When a gene exists in more than two alternate forms called multiple alleles.Blood group ABO is an example of multiple alleles.
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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 are multiple alleles,give its example?

  • Ans 1: When a gene exists in more than two alternate forms called multiple alleles.Blood group ABO is an example of multiple alleles.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 2

Question # 1

Differentiate between continuous and discontinuous variations.

  • Ans 1: Continuous variations: In Continuous variations many intermediate forms of a trait are present and organism show very small difference for a trait.For example skin color,eye color.
  • Ans 2: Discontinuous variations: In discontinuous variations very sharp difference is present and no intermediate forms are present for a trait.For example tongue rolling,attached or free pinna.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 3

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 4

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 5

Question # 1

Explain testicular feminization syndrome.

  • Ans 1: Testicular feminization syndrome is a rare X linked recessive trait.Although the persons affected by this trait have a set of XY chromosome.Yet tfm gene on their X chromosome develops them physically into females.They have breast,female genitalia a blind vagina but no uterus,degenerated testis are also present in abdomen.Such individuals are happily married as female but are sterile.it is an androgen insensitivity syndrome.Male sex hormone testoterone has no effect on them.
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12th Class Biology Chapter 22 Short Questions Preparation - Set 6

Question # 1

What is beanbag genetics? Explain.

  • Ans 1: Beanbag genetics means that alleles are like a bean bag.The entire bean bag full of beans is the gene of the population.In the bean bag approach we can imagine the entire gene pool comprising all the alleles for all different traits at once,or we can just focus on some subset,such as all the alleles for a single trait
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12th Class Biology Chapter 22 Short Questions

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