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A woman with 47 chromosomes due to pres...

A woman with 47 chromosomes due to presence of additional 21 chromosome is characterised by

A

Super femaleness

B

Turner's syndrome

C

Down's syndrome

D

Triploidy

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Normal Chromosome Count**: In a normal human being, the diploid number of chromosomes is 46, which includes 44 autosomes and 2 sex chromosomes (XX for females and XY for males). 2. **Identifying the Genetic Condition**: The question states that the woman has 47 chromosomes due to an additional 21st chromosome. This indicates that instead of the normal 2 copies of chromosome 21, she has 3 copies. 3. **Defining Trisomy**: The presence of an extra chromosome is referred to as "trisomy." In this case, having three copies of chromosome 21 is specifically known as Trisomy 21. 4. **Linking to Down Syndrome**: Trisomy 21 is commonly known as Down syndrome. Individuals with Down syndrome exhibit specific physical and developmental characteristics, including short stature, a round head, a furrowed tongue, and potential heart defects. 5. **Excluding Other Options**: The other options mentioned (such as superfemaleness and Turner syndrome) are related to sex chromosome abnormalities. Since the question pertains to an additional autosome (chromosome 21), these options do not apply. 6. **Conclusion**: Therefore, the correct characterization of a woman with 47 chromosomes due to an additional 21st chromosome is Down syndrome. **Final Answer**: The woman is characterized by Down syndrome. ---
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