A baby with Down Syndrome.
A normal cell has 23 chromosomes and no copies. A cell that causes down syndrome has a full or half copy of the 21 chromosome.
Why it occurs? No one know for sure why it occurs.
How it occurs? For some reason the 21st chromosome is copied.
Down syndrome can occur to any one it affects 1 in 800 new borns.
Klinefelter Syndrome is where a male has a extra x chromosome causing abnormalitys in their body.
This occurs because there are random events during the formation of reproductive cells.
It occurs because there is an extra chromosome.
It only occurs to males.
Turner syndrome is a chromosomal condition that affects development in females.
why this happens, some of an affected person's cells have the usual two sex chromosomes, and other cells have only one copy of the X chromosome.
how this happens random event during cell division in early fetal development.
This occurs to women.
Color blindness is when someone cannot distinguish between certain colors, usually between greens and reds, and occasionally blues.
Why does this happen When someone is missing their color cones.
How this happens The woman carries the trait and gives it to her offspring
This happens more offten to males but can happen to females too.