Briefly explain how the existence of aneuploidies has
geneticists assess the genetic basis for sex determination in
humans. and locate genes on specific chromosomes.

Aneuploidy refers to the change in chromosomal number 23, which can lead to genetic diseases.

Explanation:

Numerical abnormalities in sexual chromosomal abnormalities involve the loss or gain of a sex chromosome generating aneupliodes individuals. Generally, the loss of chromosomes has a greater impact on an individual than the gain, although this can also have serious consequences.

Within sexual aneuploidies we can distinguish the following:

· Sexual trisomies: it is a common disorder that is usually detected at puberty since there are no characteristic physical features in infants or children. Trisomies are those where an extra sex chromosome is evidenced

§ Klinefelter syndrome, XXY

§ Triple X syndrome, XXX (Called super female syndrome)

§ Double Y syndrome, XYY (called superman syndrome)

· Sexual monosomies: Cells that have lost a sex chromosome

§ Turner syndrome, XO

· Sex polysomies:

§ XXXY

§

§ Other

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

b

is correct hope this   also i learnd this in middle school