Rachael is observing a few slides taken from a female orangutan. She observes an ovarian slide where all the cells show chromosome tetrads in synapses. Which stage of meiosis has Rachael observed?

Answer 1

Rachael has seen the cells in prophase 1 of meiosis . Specifically tetrads are seen in PACHYTENE substage of prophase 1. (Tetrads show chiasmata in next stage of prophase 1 i.e. in diplotene.)

Please note two things (regarding the statements in question):

  • in a tissue section not all cells will undergo meiosis, only primary oocytes will undergo meiosis 1.

    AND

    • first meiotic division starts in fetal life and it remains arrested after childhood in hominids (apes and human).

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Answer 2

Rachael has observed the pachytene stage of meiosis.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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