Heredity and Evolution Quiz | Heredity and Evolution Objective Type Questions and Answers
Questions
21
Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be
Answer: Cross fertilization
22
If a round, green seeded pea plant (RR yy) is crossed with wrinkled, yellow seeded pea plant, (rr YY) the seeds production in F1 generation are
Answer: Round and yellow
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23
In human males all, the chromosomes are paired perfectly except one. This/these unpaired chromosome is/are
(i) Large chromosome (ii) Small chromosome (iii) Y-chromosome (iv) X-chromosome
Answer: (iii) and (iv)
24
A zygote which has an X-chromosome inherited from the father will develop into a
Answer: Girl
25
New species may be formed if
(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
Answer: (I) and (ii)
26
Two pea plants, one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce F1 progeny that have round, yellow (RrYy) seeds. When F1 plants are selfed, the F2 progeny will have new combination of characters. Choose the new combination from the following.
(i) Round, yellow (ii) Round, green (iii) Wrinkled, yellow (iv) Wrinkled, green
Answer: (i) and (iv)
27
If the fossil of an organism is found in the deeper layers of earth, then we can predict that
Answer: The extinction of organism has occurred thousands of years ago
28
Which of the following statements is not true with respect to variation?
Answer: All variations in a species have equal chances of survival
29
Select the group which shares maximum number of common characters
Answer: Two individuals of a species
30
The two versions of a trait (character) which are brought in by the male and female gametes are situated on
Answer: Copies of the same chromosome
31
Select the statements that describe characteristics of genes
(i) Genes are specific sequence of bases in a DNA molecule (ii) A gene does not code for proteins (iii) In individuals of a given species, a specific gene is located on a particular chromosome (iv) Each chromosome has only one gene
Answer: (i) and (iii)
32
The number of pair(s) of sex chromosomes in the zygote of humans is
Answer: One
33
A human genetic defect that is caused by nondisjuction of the sex chromosome is
Answer: Turner syndrome
34
Genetic traits of seeds are noted as follows:
L = long, l = short W = wrinkled, w = smooth Y = yellow, y = white R = ribbed, r = grooved
Which of the following is the genotype for a short, wrinkled, yellow, grooved seed?Answer: llWwYYrr
