Genetic disorders can result when sister chromatids fail to separate properly.
During which phase is this problem most likely to occur?

Anaphase Il of meiosis is the phase in which sister chromatids fail to separate properly from each other. It is a genetic disorder.

This nondisjunction also occurs in mitosis of cell division. It cannot pass from parents to offspring because mitosis occurs in body cells not sex cells. This nondisjunction in mitosis causes serious disease such as cancer. Cancer disease also contain abnormal number of chromosome.

i don't know. the other person does though.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.