Question

son's C 2 on en 9 10 11 12 13 14 15 16 17 18 19 20 21 22 X Y
Draw a diagrammatic representation of son’s 14 and 21 chromosomes clearly labelling any abnormalities such as translocations. In your diagram, you should clearly indicate which parent son inherited each chromosome. If it is not possible to determine the origin of inheritance for a chromosome, clearly indicate as “unknown” or “?”

Answer 1

K 14 21st 23 BE delelor in chromosome Trendboration T Trisomy of ast chromosome

in 14 th chromosome pair , we can see deletion in one of the chromosomes. This chromosme, the son must have definitely got from the mother.

In 21st pair, it is trisomy. There is one chromosome which shows translocation. At the same time, there are 3 chromosomes in the pair. The translocated chromosome, the son must have got definitely from mother as she also has one chromosome showing translocation. Trisomay may be due to non - disjunction during gamete formation in either mother or in father. This can't be determined where non-disjunction during gamete formation occurred.

So the source of trisomy is unknown.