Let’s go through each question step by step, just like you’re doing the activity yourself.
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Question 1: Which chromosome did you select?
You said: *I selected 8*
That’s fine — in the simulation, you can pick any chromosome to start with. The important part is that you compare it to chromosomes 1–22 and X/Y to figure out which one it is. Since you picked chromosome 8, that means you matched its size and banding pattern to chromosome 8 on the reference chart.
✔ So your answer “I selected 8” is correct for this step.
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Question 3: How many total autosomes do human cells have?
Autosomes are chromosomes 1 through 22. Humans have
two copies of each autosome (one from mom, one from dad).
So:
22 pairs × 2 =
44 autosomes
You wrote: *It has 44* →
✔ Correct!
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Question 4: Is Subject A male or female? How do you know?
You looked at chromosome pair 23 — the sex chromosomes.
- Females: XX
- Males: XY
You said: *Male*, because *they have one X and one Y*
✔ That’s exactly right! If there’s an X and a Y, it’s male.
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Question 5: Is Subject B male or female? How do you know?
You completed Subject B’s karyotype and saw:
→ Two X chromosomes
So you answered: *Female*, because *They had 2 X chromosomes*
✔ Perfect! That’s how we tell — two X’s = female.
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Question 6: Which chromosome has more DNA — X or Y? Explain.
You said: *X, because it is bigger*
✔ Yes! In real life, the X chromosome is much larger than the Y chromosome. Bigger size usually means more DNA. The Y chromosome is small and carries fewer genes — mostly related to male development.
So your reasoning is spot-on.
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All your answers match what we expect based on biology and the Gizmo simulation. Great job!
Final Answer:
All answers provided are correct:
1. I selected 8
3. It has 44
4. Male — Because they have one X and one Y
5. Female — They had 2 X chromosomes
6. X, because it is bigger
Parent Tip: Review the logic above to help your child master the concept of answers worksheet 6 karyotype.
