विस्तृत क्रॉस आरेख/फ्लोचार्ट की सहायता से मानव में लिंग निर्धारण की क्रियाविधि का वर्णन कीजिए। समझाइए कि बच्चे के लिंग के लिए पिता क्यों उत्तरदायी है।

Q: विस्तृत क्रॉस आरेख/फ्लोचार्ट की सहायता से मानव में लिंग निर्धारण की क्रियाविधि का वर्णन कीजिए। समझाइए कि बच्चे के लिंग के लिए पिता क्यों उत्तरदायी है।

Introduction to Sex Determination in Humans\nSex determination is the process by which the sex of a newborn individual is determined. In human beings, sex determination is genetically controlled and depends on the type of sex chromosomes inherited from the parents. Chromosomal Setup in Humans Human cells contain 23 pairs of chromosomes (total 46 chromosomes). Out of these, 22 pairs are autosomes (common in both males and females). The 23rd pair consists of sex chromosomes. Females possess two X chromosomes ($XX$). Therefore, all female gametes (ova) carry a single X chromosome ($X$). Males possess one X and one Y chromosome ($XY$). Therefore, male gametes (sperm) are of two types: 50% carry an X chromosome ($X$) and 50% carry a Y chromosome ($Y$). Mechanism of Sex Determination Flowchart Parents: Father ($XY$) $\times$ Mother ($XX$) Gametes: $X$ and $Y$ (from Father), $X$ and $X$ (from Mother) Fertilization Scenarios: If a sperm carrying an $X$ chromosome fertilizes an egg carrying an $X$ chromosome, the zygote becomes $XX$, resulting in a female child ($50\%$ probability). If a sperm carrying a $Y$ chromosome fertilizes an egg carrying an $X$ chromosome, the zygote becomes $XY$, resulting in a male child ($50\%$ probability). Conclusion: Role of the Father\nSince the mother can only provide an $X$ chromosome to the offspring, she does not determine the sex of the child. The father produces two different types of sperms ($X$ and $Y$). Therefore, it is entirely a matter of chance whether an $X$-bearing sperm or a $Y$-bearing sperm fertilizes the egg, making the father genetically responsible for the sex of the child.

Question

Accepted Answer

Introduction to Sex Determination in Humans
Sex determination is the process by which the sex of a newborn individual is determined. In human beings, sex determination is genetically controlled and depends on the type of sex chromosomes inherited from the parents. Chromosomal Setup in Humans Human cells contain 23 pairs of chromosomes (total 46 chromosomes). Out of these, 22 pairs are autosomes (common in both males and females). The 23rd pair consists of sex chromosomes. Females possess two X chromosomes ($XX$). Therefore, all female gametes (ova) carry a single X chromosome ($X$). Males possess one X and one Y chromosome ($XY$). Therefore, male gametes (sperm) are of two types: 50% carry an X chromosome ($X$) and 50% carry a Y chromosome ($Y$). Mechanism of Sex Determination Flowchart Parents: Father ($XY$) $	imes$ Mother ($XX$) Gametes: $X$ and $Y$ (from Father), $X$ and $X$ (from Mother) Fertilization Scenarios: If a sperm carrying an $X$ chromosome fertilizes an egg carrying an $X$ chromosome, the zygote becomes $XX$, resulting in a female child ($50\%$ probability). If a sperm carrying a $Y$ chromosome fertilizes an egg carrying an $X$ chromosome, the zygote becomes $XY$, resulting in a male child ($50\%$ probability). Conclusion: Role of the Father
Since the mother can only provide an $X$ chromosome to the offspring, she does not determine the sex of the child. The father produces two different types of sperms ($X$ and $Y$). Therefore, it is entirely a matter of chance whether an $X$-bearing sperm or a $Y$-bearing sperm fertilizes the egg, making the father genetically responsible for the sex of the child.