Question

Question: The alien species has decided that they want to use a ray gun on you that will duplicate or remove one of the 23 types of chromosomes in all of your body cells. You get to choose which chromosome is affected (choose the the one that would impact your life the least).

If your last name begins with H-Z, choose a chromosome that will be duplicated (only one will be duplicated so you will now have 47 chromosomes).

List 5 types of important genes found on that chromosome and list the source where you got this info.is chromosome( 1,2,3,X,y ) is correct.

Answer 1

Ans. Assuming the target individual is a female -

# Presence of an extra X-chromosome in females (47, XXX or X-trisomy) does not exhibit any abnormality in around 90% of cases. It is because, the extra X-chromosomes are randomly inactivated in form of Barr bodies, such that each cell generally has only one functional copy of the X-chromosome. Because each cell has a functional copy of X-chromosome, the normal gene functions are expressed without any adverse effects in around 90% cases.

# Genes on X-chromosome-

            APOO (encodes apolipoprotein )

            TRO (encodes Trophinin)

            SMS (encodes Spermine synthase enzyme)

            PLAC1 (encodes Placenta-specific protein 1)

            MIR660 (encodes protein MicroRNA 660)