Chapter 10 Section 10 2 Meiosis Worksheet Answer Key - Fill Online ... - Free Printable

Let’s go step by step to answer each question using the table and what we know about meiosis.

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Question 1: What is the diploid number of chromosomes in corn?

Look at the row for “Corn” in the table.
The column “Body Cell (2n)” shows 20.
That means the diploid number (2n) for corn is 20.

✔ Answer: 20

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Question 2: What is the haploid number of chromosomes in wheat?

Look at the row for “Wheat”.
The column “Gamete (n)” shows 21.
Gametes are haploid cells, so the haploid number (n) is 21.

✔ Answer: 21

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Question 3: Is the chromosome number related to the complexity of the organism?

Let’s think:
- Humans have 46 chromosomes — pretty complex.
- But a fern has 500+ chromosomes — way more than humans!
- A fruit fly only has 8 — but it’s still a living, moving animal.
- Corn has 20, dog has 78 — dogs aren’t necessarily “more complex” than humans just because they have more chromosomes.

So, no — having more chromosomes doesn’t mean an organism is more complex. It’s not about how many, but how they’re used.

✔ Answer: No, chromosome number is not related to complexity.

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Question 4: How many pairs of chromosomes do human beings have?

Humans have 46 chromosomes in body cells (from the table).
Since chromosomes come in pairs (one from mom, one from dad), divide by 2:

46 ÷ 2 = 23 pairs

✔ Answer: 23 pairs

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Question 5: What process maintains a constant number of chromosomes within a species?

When organisms reproduce sexually, gametes (sperm and egg) must have half the chromosomes so that when they combine, the baby gets the right total.

This happens through meiosis — the cell division that makes gametes with half the chromosomes.

Without meiosis, every generation would double the chromosome number — which doesn’t happen. So meiosis keeps the number constant.

✔ Answer: Meiosis

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Final Answer:
1. 20
2. 21
3. No, chromosome number is not related to complexity.
4. 23 pairs
5. Meiosis