In which stage of the cell cycle are sister chromatids separated and pulled to the opposite poles of the cell?

Which correctly describes crossing over ?

What is the tern used to describe an individual that of a recessive allele that causes disease,but is otherwise healthy? a.carrier b.polycite c.target d.afflicted

What is a quantitative observation? a. an observation that proves the hypothesis is wrong. b. an observation about the number or amount of something. c. an observation about the color, shape, size, or condition of something. d. an observation in which the appearance of something is described using descriptive language.