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Yes, they should be worried because the sister of this man could be a carrier of the recessive allele. If so, then half of their male children are likely to be affected.
Children's" is the correct English word for ownership by children. - cannot be used to indicate plural forms. Having a child is a "child" and having multiple children is a "child". Mar
The United Nations Convention on the Rights of the Child (UNCRC) defines a child as being under the age of 18 "unless the law applicable to the child reaches the age of majority earlier".
The United Nations Convention on the Rights of the Child defines a child as “anyone under the age of 18 unless the law applicable to the child provides for earlier attainment of the majority”. It has been ratified by 192 out of 194 Member States.
Most countries set the age of majority at 18 years. However, it is important to note that this is not the case for all countries. Similarly, in the US, this varies from state to state. Most states set the age of majority as 18.
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