For the first question, the answer is Klinefelter Syndrome. (From what I understood, this is the type of answer I should give?) Karyotype is size order display of chromosomes.
For the second question, the answer is nondisjunction. ("<span>the failure of homologous chromosomes or sister chromatids to separate properly during cell division.")</span>
INVERTEBRATE refers to animals such as insects, sea anemones, and worms that lack an interior skeleton.
Interior skeleton are also identified as back bone. So organisms without back bone are called invertebrates.
I believe the answer is A
Hope you give me brainliest if it’s correct