The genetic disease in which (1) the 23rd pair of chromosomes is always involved, (2) there are always two chromosomes that comprise the 23rd pair, and (3) there is always something wrong with one or both of the chromosomes is called a

Explanation:

The genetic disease in which (i) the 23rd pair of chromosomes is always involved, (ii) there are always two chromosomes that comprise the 23rd pair, and (iii) there is always something wrong with one or both of the chromosomes is called a Genetic abnormality.

A genetic abnormality is happens  by one or more abnormalities in the genome. It can be occurred by a mutation in a single gene  or multiple genes or by a chromosomal abnormality.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )