An abnormal human baby with 'XXX' sex chromosomes was born due toa)formation of abnormal sperms in the fatherb)formation of abnormal ova in the motherc)fusion of two ova and one spermd)fusion of two sperms and one ovumCorrect answer is option 'B'. Can you explain this answer?

Question

An abnormal human baby with 'XXX' sex chromosomes was born due toa)formation of abnormal sperms in the fatherb)formation of abnormal ova in the motherc)fusion of two ova and one spermd)fusion of two sperms and one ovumCorrect answer is option 'B'. Can you explain this answer?

Answer

Triple X syndrome occurs in women, who inherit three X chromosomes--their genotype is XXX. This type of syndrome is very rare and occurs due to defects in meiosis 1 and 2 during gamete formation in the mother and produces abnormal ova.

Answer

Answer

Yes ...when additional copy of chromosomes attached and leads to klinefelter syndrome a non mendelian disorder

Answer

Explanation:
An abnormal human baby with XXX sex chromosomes was born due to the formation of abnormal ova in the mother.

Formation of abnormal ova in the mother:
The normal human sex chromosomes are designated as XX for females and XY for males. However, in some cases, there can be abnormalities in the sex chromosome composition, leading to conditions such as XXX syndrome.

During the process of oogenesis, the formation of eggs or ova in females, errors can occur that result in abnormal chromosome numbers. In the case of XXX syndrome, an additional X chromosome is present, resulting in a total of three X chromosomes (XXX) instead of the normal two (XX).

Causes of abnormal ova:
There are several possible causes for the formation of abnormal ova:
1. Non-disjunction: Non-disjunction refers to the failure of chromosomes to separate properly during meiosis. This can result in the formation of eggs with an abnormal number of chromosomes. In the case of XXX syndrome, non-disjunction can occur during the separation of the X chromosomes, leading to the production of eggs with three X chromosomes.
2. Chromosomal rearrangements: Structural abnormalities in the chromosomes can also contribute to the formation of abnormal ova. For example, if there is a duplication or translocation involving the X chromosome, it can lead to the production of eggs with three X chromosomes.

Impact on the baby:
When an egg with three X chromosomes is fertilized by a sperm with a normal X chromosome, the resulting embryo will have a total of four X chromosomes. However, during the early stages of development, one of the X chromosomes is usually inactivated, forming a Barr body. This process helps to compensate for the extra genetic material and ensures that the baby develops relatively normally.

Conclusion:
In conclusion, an abnormal human baby with XXX sex chromosomes is born due to the formation of abnormal ova in the mother. This can occur as a result of errors during oogenesis, such as non-disjunction or chromosomal rearrangements. The presence of an additional X chromosome can lead to XXX syndrome, where the baby has three X chromosomes instead of the normal two.

Answer

Can any one explain how the given explanation matches the answer?

Top Courses for NEETView all

Daily Test for NEET Preparation

NEET Mock Test Series - Updated 2026 Pattern

Topic-wise MCQ Tests for NEET

Biology Class 11

DPP: Daily Practice Problems for NEET

Top Courses for NEET

Top Courses for NEET

Related Content

Mock Test & Practice

Main Subjects

Guided Learning

Revision

Competitive & Government Exams