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What is happening during this phase of Mitosis (Anaphase I)?

If a sperm cell contains 8 chromosomes, it comes from an animal that has  _______ chromosomes. 

For natural selection to occur, there must be some preexisting genetic variation in a population. Natural selection does not create the variation. Instead, it impacts individuals differently based on their genotype.

What are abiotic components?

Genotype is the genetic makeup of an organism. 

For a population to be in Hardy-Weinberg equilibrium there are no changes in gene frequencies from one generation to the next. 

Mitosis is the type of cell division associated with  _______ and  _______

Alternate forms of the same gene are called 

Occasionally, chromosomes fail to separate during meiosis, leading to a condition in which the diploid number is not normal. This phenomenon is called nondisjunction.

Meiosis I produces  _______ haploid cells, and meiosis II produces _______ haploid cells.