Sheryl is observing ovarian slides taken from a female ape. All the cells show crossover chromosomes. What is this stage? ОА
meiotic prophasel
ОВ.
meiotic prophase II
Ос.
meiotic metaphase

meiotic prophasel

Explanation:

Crossing-over is a unique phenomenon that only occurs during meiotic division or gamete formation. It is the process whereby non-sister chromatids of homologous chromosomes exchange a portion of the their chromosome.

Crossing-over occurs specifically in the Prophase 1 stage of meiosis, where homologous chromosomes lie side by side to form a TETRAD structure and exchange their chromosomal segment. Crossing-over aims at promoting genetic diversity among sexually-reproducing organisms.

Therefore, an ovarian slide observed to show crossing-over occurs at the Prophase I stage of meiosis 1.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: