Problem Analysis:
The image provided shows a karyotype, which is a visual representation of an individual's chromosomes. The task involves analyzing the karyotype to determine whether it belongs to a male or female, whether it is normal or mutated, and how many chromosomes are present.
Step-by-Step Solution:
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4. Is the karyotype to the right a male or female? How do you know?
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Key Observation: In humans, females have two X chromosomes (XX), while males have one X chromosome and one Y chromosome (XY). The Y chromosome is typically smaller than the X chromosome.
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Analysis of the Karyotype:
- The karyotype shows 23 pairs of chromosomes in total.
- The last pair (the sex chromosomes) consists of one large chromosome (X) and one small chromosome (Y).
- This pattern (XY) is characteristic of males.
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Conclusion: The karyotype represents a
male.
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5. Is this a normal or mutated karyotype?
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Key Observation: A normal human karyotype consists of 46 chromosomes arranged into 23 pairs. Any deviation from this pattern (e.g., extra or missing chromosomes, structural abnormalities) indicates a mutation.
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Analysis of the Karyotype:
- The karyotype shows 23 pairs of chromosomes, totaling 46 chromosomes.
- All chromosomes appear to be paired correctly, with no visible structural abnormalities (such as deletions, duplications, or translocations).
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Conclusion: This is a
normal karyotype.
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6. How many chromosomes does a healthy human have? How many pairs?
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Key Observation: A healthy human has 46 chromosomes in total, organized into 23 pairs.
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Analysis:
- The karyotype shows 23 pairs of chromosomes.
- Each pair consists of two homologous chromosomes, resulting in a total of \( 23 \times 2 = 46 \) chromosomes.
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Conclusion: A healthy human has
46 chromosomes in
23 pairs.
Final Answers:
1.
Is the karyotype to the right a male or female? How do you know?
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Answer: Male. The presence of one X chromosome and one Y chromosome (XY) indicates a male.
2.
Is this a normal or mutated karyotype?
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Answer: Normal. The karyotype shows 46 chromosomes in 23 pairs with no visible abnormalities.
3.
How many chromosomes does a healthy human have? How many pairs?
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Answer: A healthy human has
46 chromosomes in
23 pairs.
Boxed Final Answer:
\[
\boxed{\text{Male, Normal, 46 chromosomes, 23 pairs}}
\]
Parent Tip: Review the logic above to help your child master the concept of karyotypes worksheet.
