science
Grade-10
Easy
Question
Which of the following does not result in variations among siblings?
Independent assortment of genes
Crossing over
Linkage
Mutation
Independent assortment of genes
Crossing over
Linkage
Mutation
Hint:
The genes are closely related when the linkage occurs
The correct answer is: Linkage
- The proximity of genes or other DNA sequences to each other on the same chromosome.
- The closer two genes or sequences are on the chromosome, the more likely they are to be inherited together.
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Hemophilia disease is produced in the male by how many gene/s?
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- Hemophilia is a blood disorder that delays blood clotting or hemostasis
- Blood clotting is a result of cascade of reactions done by clotting factors (1 to 12)
- Absence of clotting factor VIII or IX causes hemophilia
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Hemophilia disease is produced in the male by how many gene/s?
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- Genetic disorders can be chromosomal, multifactorial and monogenic
- Hemophilia is a blood disorder that delays blood clotting or hemostasis
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How do genetic disorders happen?
- Genetic disorder is due to alteration in gene sequence
- The gene sequence change can occur in a cell irrespective of type of cell division a cell undergoes
- Mutation can occur at any point of cell division
- Trisomy can be attributed as a result of meiosis
How do genetic disorders happen?
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- Genetic disorder is due to alteration in gene sequence
- The gene sequence change can occur in a cell irrespective of type of cell division a cell undergoes
- Mutation can occur at any point of cell division
- Trisomy can be attributed as a result of meiosis
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In Down’s syndrome of a male child, the sex chromosome is
- Down syndrome is a genetic disorder
- It is a trisomy condition having extra copy of chromosome 21
- The individual affected will have disability associated with nervous system
- Sex chromosome remains unaffected irrespective of the disorder
In Down’s syndrome of a male child, the sex chromosome is
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- Down syndrome is a genetic disorder
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Which one is a hereditary disease?
- Pleiotropy is a condition where a single gene is responsible for control of multiple unrelated traits of an individual
- Individuals with phenylketonuria lack the ability to process phenylalanine to tyrosine due to absence of an enzyme, This results is decreased metabolism.
- Leprosy is caused by Mycobaterium leprae
- Cataract and general blindness are caused due to environmental interferences
Which one is a hereditary disease?
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- Pleiotropy is a condition where a single gene is responsible for control of multiple unrelated traits of an individual
- Individuals with phenylketonuria lack the ability to process phenylalanine to tyrosine due to absence of an enzyme, This results is decreased metabolism.
- Leprosy is caused by Mycobaterium leprae
- Cataract and general blindness are caused due to environmental interferences
