The spindle fibres of a chromosome failed to separate a chromosome to sister chromatids during anaphase of mitosis resulting in an additional sister chromatid being pulled into a Daughter cell, hence having 39 chromosomes; and the other Daughter cell having one less chromosome.
Answer:
UV radiation may cause negative regulators (tumor suppressors) to be under-expressed. UV radiation may cause positive regulators (oncogenic) to be over-expressed.
Explanation:
I found this on a quizlet. So credits to them- :)
The retina; I may be wrong.
The answer is B, as for the flower to produce seeds, it needs to have been previously fecundated by a male gamete.