Which of the following event/s occur in prophase-I?
a) tight coiling of DNA
b) identical chromosomes pair up
c) exchange of segments
d) all of these
The process of exchange of material during prophase-I is called……..
a) mating
b) fertilization
c) crossing over
d) none of these.
Explanation:crossing over, is the exchange of genetic material during sexual reproduction between two homologous chromosomes' non-sister chromatids that results in recombinant chromosomes. It is one of the final phases of genetic recombination, which occurs in the pachytene stage of prophase I of meiosis during a process called synapsis
Which of the
following is the first phase of meiosis-I?
a) prophase-I
b) metaphase-I
c) anaphase-I
d) telophase-I
What occurs in metaphase-I?
a) crossing over
b) alignment of pair of chromosomes
c) movement of chromosomes
d) all of these
Which of the following event/s occur in anaphase-I?
a) pair of chromosomes separated
b) separated chromosomes move to their respective poles
c) uncoiling of chromosomes
d) both a and b
Which of the following event/s occur during telophase-I?
a) nuclear membrane reappear
b) two daughter cells with half number of chromosomes produced
c) alignment of chromosomes
d) both a and b
