CBSE Questions for Class 10 Biology Heredity And Evolution Quiz 11 - MCQExams.com


On crossing two heterozygous tall plants (Tt), a total of 500 plants were obtained in $$F_1$$ generation. What will be the respective number of tall and dwarf plants obtained in the $$F_1$$ generation?
  • 375, 125
  • 250, 250
  • 475, 25
  • 350, 150
In a dihybrid cross, $$f_2$$ generation offsprings show four different phenotypes, while the genotypes are of .......... types.
  • Six
  • Nine
  • Eight
  • Sixteen
A man having the genotype EEFfGgHH can produce P number of genetically different sperms, and a woman of genotype IiLLMmNn can generate Q number of genetically different eggs. Determine the values of P and Q.
  • P = 4, Q = 4
  • P = 4, Q = 8
  • P = 8, Q = 4
  • P = 8, Q = 8
Choose the correct answer from the alternatives given.

In a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.
Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?
  • 9:3:3:1 Ratio of Phenotypes only
  • 9 : 3: 3: 1 Ratio of Genotypes only
  • 1: 1: 1: 1 Ratio of Phenotypes only
  • 1: 1: 1: 1 Ratio of Phenotypes and Genotypes
In garden pea plant, a pure line with round seeds(RR) is crossed with a pure line having wrinkled seeds (rr). The ratio of round seed plants to wrinkled seed plants in $$F_2$$ generation will be?
  • $$1:2$$
  • $$2:1$$
  • $$1:3$$
  • $$3:1$$
In pea plants, the long stem trait 'S' is dominant and the short stem trait 's' is recessive. Two pea plants were crossed, producing seeds that yielded 165 long stem plants and 54 short stem plants. The genotypes of the parent plants that was most likely is?
  • Ss and SS
  • Ss and Ss
  • ss and ss
  • SS and ss
Which one of the Mendel traits of Pea was recessive
  • Tall height
  • Green pod
  • Green seed colour
  • Round seed.
The genotype for the height of an organism is 'Tt'. What conclusion can be drawn from this?
  • The allele for height has at least two different genes.
  • There are at least two different alleles for the gene controlling height.
  • There are two different genes for height, each having a single allele.
  • There is one allele for height with two different forms.
A tall plant obtained by crossing a homozygous tall and dwarf plants was grown in nutrient-deficient soil. The plant remained dwarf. When this plant was crossed with a dwarf plant, then:
  • All plants are dwarf
  • All plants are tall
  • 50% tall and 50% dwarf plants obtained
  • 75% tall and 25% dwarf plants obtained
Which of the following terms are defined correctly?
TermDefinition
iHeredityThe passing on of characteristic from parents to their young.
iiLife cycleThe different stages of development of a living thing from a fertilised egg to an adult that can reproduce and die eventually. 
iiiReproduction The fusion of a sperm and an egg.
  • i and ii only
  • i and iii only
  • ii and iii
  • i ii and iii
A homozygous tall plant was grown in nutrient deficient soil and remained dwarf. When it is crossed with dwarf plant then?
  • All hybrid plants are dwarf
  • All hybrid plants are tall
  • $$50\%$$ tall and $$50\%$$ dwarf
  • $$75\%$$ tall and $$25\%$$ dwarf
The ability to walk upright on two legs is called___________.
  • bipedalism
  • quadropedalism
  • bicyclopedalism
  • tripedalism
In Peas, a pure tall plant (TT) is crossed with a short plant (tt). the ratio of pure tall plants to short plants in $$F_2$$ is?
  • 1 : 3
  • 3 : 1
  • 1 : 1
  • 2 : 1
State whether the given statement is True or False:
Human beings are the pinnacle of evolution.
  • True
  • False
Among the seven pairs of contrasting traits in pea plant as studied by Mendel, the number of traits related to flower, pod and seed respectively were
  • 2, 2, 2
  • 2, 2, 1
  • 1, 2, 2
  • 1, 1, 2
State whether the given statement is True or False:
A bird species with short beak will always have a short beak for generations, even if it has a difficulty in catching worms.
  • True
  • False
0:0:1


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