Nearly all life cycles have both haploid and diploid phases. Usually, the transition from haploid to diploid takes place _____.
a. during crossing over in meiosis
b. when DNA is replicated during the S phase of the cell cycle
c. when mitotic cytokinesis occurs
d. at fertilization, when gametes fuse
e. during mitosis

Question

Nearly all life cycles have both haploid and diploid phases. Usually, the transition from haploid to diploid takes place _____.
a.	during crossing over in meiosis
b.	when DNA is replicated during the S phase of the cell cycle
c.	when mitotic cytokinesis occurs
d.	at fertilization, when gametes fuse
e.	during mitosis

alphadxg · Answer

D, because this is when it goes form Haploid to Diploid because they fuse to form a zygote which is a diploid cell now, and can be used by mitosis to further divide into a human being.