In which cell division one member of homologous chromosomes moves to opposite pole during anaphase and generates variability due to segregation and recombination?
A) Mitosis
B) Meiosis
C) None of the above
D) Both
Explanation: Meiosis produces variability due to segregation and recombination during anaphase I.
The cell division helps in maintaining the chromosome number constant in a species?
A) Mitosis
B) Meiosis
C) Both
D) None of the above
Explanation: Meiosis reduces chromosome number to maintain species-specific ploidy after fertilization.
Which cell division is essential for sexually reproducing species for the continuity of generation?
A) Mitosis
B) Meiosis
C) Both
D) None of the above
Explanation: Mitosis is required for growth and somatic continuity, while meiosis ensures gamete formation.
During dipotene stage in oocyte, nuclei of both vertebrates and invertebrates and spermatocyte nuclei of Drosophila which chromosomes are found?
A) Lampbrush
B) Polytene
C) None of the above
D) Both
Explanation: Polytene chromosomes are large, banded chromosomes observed in salivary glands and some oocytes.
Balanbani (1881) reported the chromosome in the salivary glands of dipteran insects?
A) Lampbrush chromosome
B) Polytene chromosome
C) Both
D) None of the above
Explanation: Lampbrush chromosomes were first observed by Balanbani in salivary glands of dipteran insects.
Some species possess extra chromosomes which are not members of normal chromosome complements are called?
A) B chromosomes
B) Chromosome
C) Both
D) None of the above
Explanation: B chromosomes are supernumerary chromosomes not essential to normal development.
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