Page 1 - 3-Home Assignment-I (Obj & Subj)-Accumulation of Variations, Inerited Traits

SAI International School
Subject- Biology
Chapter- Heredity And Evolution
Subtopic- Accumulation of variation during Reproduction,
Heredity- Inherited traits, Mendel’s work, Monohybrid cross
Module-23
Home Assignment- I
Objective- MCQ

Assessment- MCQ
New species may be formed if
1. (i) DNA undergoes significant changes in germ cells.
(ii) Chromosome number changes in the gamete.
(iii) There is no change in the genetic material
(iv) Mating does not take place
a. (i) and (ii)
b. (i) and (iii)
c. (ii), (iii) and (iv)
d. (i), (ii) and (iii)
2. Which of the following statements is not true with respect to variation?
a. All variations in a species have equal chances of survival.
b. Change in genetic composition results in variation.
c. Selection of variants by environmental factors forms the basis of evolutionary
processes.
d. Variation is minimum in asexual reproduction.
3. According to the evolutionary theory, formation of a new species is generally due to
a. Sudden creation by nature
b. Accumulation of variations over several generations
c. Clones formed during asexual reproduction
d. Movement of individuals from one habitat to another
4. Which of the following can be called a characteristic?
a. Plants can photosynthesis
b. We have 2 eyes
c. Mango tree is multicellular
d. All of these
5. Which term represents a pair of contrasting characters?
a. Heterozygous
b. Homozygous
c. Codominant genes
d. Alleles
6. Which of the following is totally impossible outcome of Mendel’s Experiment?
a. 3 tall 1 short plant
b. 24 tall and 8 short plants
c. 8 tall and 0 short plants
d. 4 tall plants and 1 medium height plant
7. Which of the following is not a direct conclusion that can be drawn from Mendel’s
Experiment?
a. Only one parental trait is expressed

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