science
Grade-10
Easy
Question
In prophase I of meiosis I __________ occurs.
Non-disjunction
Separation of homologous chromosomes
Separation of sister chromatids
Crossing over
Non-disjunction
Separation of homologous chromosomes
Separation of sister chromatids
Crossing over
Hint:
The exchange of DNA takes place in prophase
The correct answer is: Crossing over
In prophase, I, a complex of DNA and proteins known as chromatin condenses to form chromosomes. Duplicated pairs of chromosomes, known as sister chromatids, remain connected at a central point called the centromere.
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What structures exchange genetic material during crossing over?
What structures exchange genetic material during crossing over?
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Hemophilia disease is produced in the male by how many gene/s?
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- Absence of clotting factor VIII or IX causes hemophilia
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How do genetic disorders happen?
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In Down’s syndrome of a male child, the sex chromosome is
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Select the correct match
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Which of the following can increase the rate of mutation?
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Are all mutations bad?
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Any change in the sequence of DNA is...
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In order to trace occurrence of a trait through several generations of a family, you could create a ____________.
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