The normal chromosome number of human sperm is 23. If a person is born with a trisomic condition, how many chromosomes will the somatic cells of this individual have? 21 24 45 47 48
The normal chromosome number of human sperm is 23. If a person is born with a trisomic condition, how many chromosomes will the somatic cells of this individual have? 21 24 45 47 48
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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![**Educational Content - Chromosomal Conditions**
**Question:**
The normal chromosome number of human sperm is 23. If a person is born with a trisomic condition, how many chromosomes will the somatic cells of this individual have?
**Options:**
- 21
- 24
- 45
- 47
- 48
**Explanation:**
A trisomy is a chromosomal condition caused by an extra chromosome, resulting in three copies of a particular chromosome instead of the normal two. In humans, the normal diploid number of chromosomes in somatic (body) cells is 46. This includes 23 chromosomes from the mother (via the egg) and 23 from the father (via the sperm).
In a trisomic condition, an extra chromosome is present, leading to a total of 47 chromosomes in the somatic cells of the affected individual (46 normal chromosomes + 1 extra chromosome).
Thus, the correct answer is:
- [ ] 21
- [ ] 24
- [ ] 45
- [x] 47
- [ ] 48](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1d39eb1c-3154-4bee-b19a-a1be6277f6e8%2Fd15f7f75-7bde-4ea9-be90-b2746835a6d4%2F5mua6e1e_processed.png&w=3840&q=75)
Transcribed Image Text:**Educational Content - Chromosomal Conditions**
**Question:**
The normal chromosome number of human sperm is 23. If a person is born with a trisomic condition, how many chromosomes will the somatic cells of this individual have?
**Options:**
- 21
- 24
- 45
- 47
- 48
**Explanation:**
A trisomy is a chromosomal condition caused by an extra chromosome, resulting in three copies of a particular chromosome instead of the normal two. In humans, the normal diploid number of chromosomes in somatic (body) cells is 46. This includes 23 chromosomes from the mother (via the egg) and 23 from the father (via the sperm).
In a trisomic condition, an extra chromosome is present, leading to a total of 47 chromosomes in the somatic cells of the affected individual (46 normal chromosomes + 1 extra chromosome).
Thus, the correct answer is:
- [ ] 21
- [ ] 24
- [ ] 45
- [x] 47
- [ ] 48
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