Reproduction and Heredity - 2 (Class - X)
Reproduction and Heredity - 2
Questions
In cutting method of artificial propagation, a small part of a plant is removed by making a cut with a sharp knife. Which of the following plants cannot be grown by this method?
- Bougainvillea
- Sugarcane
- Chrysanthemum
- Hibiscus
- Cactus
The sperms formed in the testes come out and go into a coiled tube called
- urethra
- seminal vesicle
- vas deferens
- epididymis
- scrotum
Mendel observed that characters are often present in pairs. A pair of contrasting characters is called a/an
- gene
- chromosome
- trait
- allele
- None of these
New plants sprout from the ‘eye’ of which of the following plants?
- Sweet potato, spinach
- Ginger, potato
- Rose, mint
- Sugarcane, tomato
What do you think was the function of a feather before it helped in flight, from evolutionary point of view?
- In obtaining nutrition
- Protecting from predators
- Providing insulation
- Camouflage
Which of the following is not a characteristic of sexual reproduction?
- It involves the formation of gametes.
- It leads to variations in the offspring.
- It produces identical copies of parents.
- It promotes diversity of characteristics in the offspring.
Deoxyribonucleic acid (DNA) consists of simple sugar phosphate and four nitrogen bases. Which of the following groups of nitrogen bases is present in a DNA molecule?
- Adenine, guanine, thymine, uracil
- Cytosine, guanine, thymine, uracil
- Adenine, thymine, guanine, cytosine
- Adenine, cytosine, thymine, uracil
There is a population of brown and green beetles. By chance, a person steps on the green beetles and all the green beetles die. The situation explains the phenomenon of
- natural selection
- genetic drift
- artificial selection
- fossilisation
Mendel’s law of segregation is based on separation of alleles during
- gamete formation
- seed formation
- pollination
- embryonic development
How many pairs of contrasting traits were considered by Mendel in pea plant?
- 7
- 8
- 6
- 9
Which of the following is a homozygous-dominant dihybrid condition?
- TTRR
- Ttrr
- TtRr
- ttRr
In peas, tall plant trait is dominant over dwarf. If a heterozygous for tall is crossed with one homozygous for dwarf, what will be the appearance of the offspring of a cross of F1?
- All tall
- All dwarf
- 50% tall and 50% dwarf
- 75% tall and 25% dwarf
If the frequency of a dominant phenotype in a stable population is 75%, then the frequency of recessive allele will be
- 25%
- 50%
- 100%
- 10%
_________ provide(s) the fluid to lubricate the ducts of male reproductive system.
- Testes
- Vas deferens
- Seminal vesicle
- Scrotum
A child who inherits an X chromosome from the father will be a
- boy
- girl
- Either (1) or (2)
- Cannot be determined