Chromosomes(General Knowledge > General Science ) Questions and Answers

Question 1. A segment of DNA
  1.    nucleosome
  2.    gene
  3.    histone
  4.    chromatin
Explanation:-
Answer: Option B. -> gene
Question 2. A heterozygous organism has
  1.    three different alleles for a trait.
  2.    two identical alleles for a trait.
  3.    only one allele for a trait.
  4.    two different alleles for a trait.
Explanation:-
Answer: Option D. -> two different alleles for a trait.
Question 3. The different forms of a gene are called
  1.    factors
  2.    alleles
  3.    masks
  4.    traits
Explanation:-
Answer: Option B. -> alleles
Question 4. Which of the following statements about homologous chromosomes is correct?
  1.    Each gene is at the same locus on both chromosomes.
  2.    They are two identical copies of a parent chromosome which are attached to one another at the centromere.
  3.    They come from the same parent.
  4.    They are chromosomes that have identical genes and alleles.
Explanation:-
Answer: Option A. -> Each gene is at the same locus on both chromosomes.
Question 5. When sex cells combine to produce offspring, each sex cell will contribute
  1.    twice the number of chromosomes in body cells.
  2.    the normal number of chromosomes in body cells.
  3.    half the number of chromosomes in body cells.
  4.    one fourth the number of chromosomes in body cells.
Explanation:-
Answer: Option C. -> half the number of chromosomes in body cells.
Question 6. If a homozygous black guinea pig (BB) is crossed with a homozygous white guinea pig (bb), what is the probability that an offspring will have black fur?
  1.    25%
  2.    50%
  3.    75%
  4.    100%
Explanation:-
Answer: Option D. -> 100%
Question 7. The term “chromosomes” literally means
  1.    Inherited bodies
  2.    Twisted threads
  3.    Coloured bodies
  4.    Shining threads
Explanation:-
Answer: Option C. -> Coloured bodies
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