Retake Objective 16 - Jennifer Lifsitz | Library

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In meiosis....(select all that apply)

Let’s say this shows meiosis in a mom’s ovary cells. Interphase in which chromosomes are copied already occurred. The red chromosomes represent grandmas DNA, and the blue chromosomes represent grandpa’s DNA. Figures 1 and 2 show Meiosis with crossing over (which does happen) and without it (which never happens). Figure 3 is a key so you know what the genes N, S, R and W code for. 

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In meiosis WITHOUT crossing over (figure 2), select all of the following gene combinations that are possible in the gamete cells produced.

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In meiosis WITH crossing over (figure 1), select all of the following gene combinations that are possible in the gamete cells produced.

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Based off your answers to questions 2 and 3, which of the following is TRUE.

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Explain why genetic variation is beneficial to a species. Use evidence from the image below to strengthen your answer.

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Random assortment is shown below. Select the proper description of this event which increases genetic variation in gametes.

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Below you can see 4 egg cells produced in a female ovary, and 4 sperm cells produced in a male testes. BEFORE the divisions shown could begin, which of the following must have occurred?