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Oogenesis, the process that creates female gametes, is halted at prophase I until puberty. Which of the following describes the DNA content of a female’s gametes during her childhood?
- a)46 chromosomes, 46 chromatids
- b)46 chromosomes, 92 chromatids
- c)23 chromosomes, 46 chromatids
- d)23 chromosomes, 23 chromatids
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Oogenesis, the process that creates female gametes, is halted at proph...
During oogenesis, the process of creating female gametes, the primary oocytes in the ovaries undergo DNA replication during fetal development but are arrested at prophase I until puberty. At the time of arrest, the primary oocytes have 46 chromosomes, which have replicated to form 92 chromatids (two chromatids per chromosome). Therefore, during childhood, the primary oocytes in the ovaries of a female would have 46 chromosomes and 92 chromatids. After puberty, only one of these primary oocytes will undergo meiosis each month, resulting in the release of an egg with 23 chromosomes and 46 chromatids (one chromatid per chromosome) during ovulation.
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Oogenesis, the process that creates female gametes, is halted at proph...
Understanding Oogenesis and DNA Content
Oogenesis is the process that produces female gametes, or eggs, in the ovaries. This process begins before birth but is arrested at prophase I of meiosis until puberty.
Key Stages of Oogenesis
- Fetal Development: In females, oogenesis begins during fetal development. Oogonia, the precursor cells, undergo mitosis to increase in number.
- Primary Oocytes: These oogonia develop into primary oocytes and enter prophase I of meiosis. At this stage, they are surrounded by a layer of granulosa cells and are referred to as primordial follicles.
Chromosome and Chromatid Content
- Diploid State: The primary oocytes are diploid, meaning they contain 46 chromosomes. Each chromosome is replicated, resulting in two sister chromatids per chromosome.
- Total Chromatid Count: Since each of the 46 chromosomes has been replicated, the total number of chromatids is 92 (46 chromosomes x 2 chromatids each).
Conclusion: Childhood DNA Content
During childhood, the female's primary oocytes remain in the arrested state with:
- 46 chromosomes (diploid status)
- 92 chromatids (due to replication)
Thus, the correct description of the DNA content of a female's gametes during childhood is:
Option B: 46 chromosomes, 92 chromatids
Oogenesis is the process that produces female gametes, or eggs, in the ovaries. This process begins before birth but is arrested at prophase I of meiosis until puberty.
Key Stages of Oogenesis
- Fetal Development: In females, oogenesis begins during fetal development. Oogonia, the precursor cells, undergo mitosis to increase in number.
- Primary Oocytes: These oogonia develop into primary oocytes and enter prophase I of meiosis. At this stage, they are surrounded by a layer of granulosa cells and are referred to as primordial follicles.
Chromosome and Chromatid Content
- Diploid State: The primary oocytes are diploid, meaning they contain 46 chromosomes. Each chromosome is replicated, resulting in two sister chromatids per chromosome.
- Total Chromatid Count: Since each of the 46 chromosomes has been replicated, the total number of chromatids is 92 (46 chromosomes x 2 chromatids each).
Conclusion: Childhood DNA Content
During childhood, the female's primary oocytes remain in the arrested state with:
- 46 chromosomes (diploid status)
- 92 chromatids (due to replication)
Thus, the correct description of the DNA content of a female's gametes during childhood is:
Option B: 46 chromosomes, 92 chromatids
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Oogenesis, the process that creates female gametes, is halted at prophase I until puberty. Which of the following describes the DNA content of a female’s gametes during her childhood?a)46 chromosomes, 46 chromatidsb)46 chromosomes, 92 chromatidsc)23 chromosomes, 46 chromatidsd)23 chromosomes, 23 chromatidsCorrect answer is option 'B'. Can you explain this answer? for MCAT 2025 is part of MCAT preparation. The Question and answers have been prepared according to the MCAT exam syllabus. Information about Oogenesis, the process that creates female gametes, is halted at prophase I until puberty. Which of the following describes the DNA content of a female’s gametes during her childhood?a)46 chromosomes, 46 chromatidsb)46 chromosomes, 92 chromatidsc)23 chromosomes, 46 chromatidsd)23 chromosomes, 23 chromatidsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for MCAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Oogenesis, the process that creates female gametes, is halted at prophase I until puberty. Which of the following describes the DNA content of a female’s gametes during her childhood?a)46 chromosomes, 46 chromatidsb)46 chromosomes, 92 chromatidsc)23 chromosomes, 46 chromatidsd)23 chromosomes, 23 chromatidsCorrect answer is option 'B'. Can you explain this answer?.
Oogenesis, the process that creates female gametes, is halted at prophase I until puberty. Which of the following describes the DNA content of a female’s gametes during her childhood?a)46 chromosomes, 46 chromatidsb)46 chromosomes, 92 chromatidsc)23 chromosomes, 46 chromatidsd)23 chromosomes, 23 chromatidsCorrect answer is option 'B'. Can you explain this answer? for MCAT 2025 is part of MCAT preparation. The Question and answers have been prepared according to the MCAT exam syllabus. Information about Oogenesis, the process that creates female gametes, is halted at prophase I until puberty. Which of the following describes the DNA content of a female’s gametes during her childhood?a)46 chromosomes, 46 chromatidsb)46 chromosomes, 92 chromatidsc)23 chromosomes, 46 chromatidsd)23 chromosomes, 23 chromatidsCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for MCAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Oogenesis, the process that creates female gametes, is halted at prophase I until puberty. Which of the following describes the DNA content of a female’s gametes during her childhood?a)46 chromosomes, 46 chromatidsb)46 chromosomes, 92 chromatidsc)23 chromosomes, 46 chromatidsd)23 chromosomes, 23 chromatidsCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Oogenesis, the process that creates female gametes, is halted at prophase I until puberty. Which of the following describes the DNA content of a female’s gametes during her childhood?a)46 chromosomes, 46 chromatidsb)46 chromosomes, 92 chromatidsc)23 chromosomes, 46 chromatidsd)23 chromosomes, 23 chromatidsCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for MCAT.
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Oogenesis, the process that creates female gametes, is halted at prophase I until puberty. Which of the following describes the DNA content of a female’s gametes during her childhood?a)46 chromosomes, 46 chromatidsb)46 chromosomes, 92 chromatidsc)23 chromosomes, 46 chromatidsd)23 chromosomes, 23 chromatidsCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Oogenesis, the process that creates female gametes, is halted at prophase I until puberty. Which of the following describes the DNA content of a female’s gametes during her childhood?a)46 chromosomes, 46 chromatidsb)46 chromosomes, 92 chromatidsc)23 chromosomes, 46 chromatidsd)23 chromosomes, 23 chromatidsCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Oogenesis, the process that creates female gametes, is halted at prophase I until puberty. Which of the following describes the DNA content of a female’s gametes during her childhood?a)46 chromosomes, 46 chromatidsb)46 chromosomes, 92 chromatidsc)23 chromosomes, 46 chromatidsd)23 chromosomes, 23 chromatidsCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
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