Question

true or false:
Q1: fragile sites are not linked to cancers.
Q2:Human monosomies are usually not lethal.
Q3:Majority of Down syndrome cases are a result of a maternal gamete carrying an abnormal number of chromosomes.
Q4:

Answer 1

Q1. FALSE-

Expliantion : Fragile site is a specific site on the chromosome that forms a gap leads to break when cell exposed to the replication stress. results the chromosomal aberration.which lead to the cancers.

Q2 FALSE

Expliantion :Human monosomy is nothimg but Turner syndrome which means people with Turne rsyndrome typically have one X chromosome instead of two .Turner syndrome is the full monosomy in human and which aare lethal to human

Q3 FALSE

Explination : Down syndrome is the genetic disorder caused when the abnormal cell division results leads to extra or partial copy of chromosome 21 . Majority times it is caused by trisomy21 i.e three copies of chromosome 21.

it is not depend only on the maternal gamete ,it depends on both maternal and paternal gamets which carries an abnormal number of chromosomes.

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