Summary Questions 1 What is the diploid number of chromosome

Summary Questions:

1. What is the diploid number of chromosomes for the normal karyotype? __________

2. What is the diploid number of chromosomes for someone with Klinefelter’s Syndrome? _________

3. Which set of chromosomes is abnormal in an individual with Down Syndrome? ________

4. Which chromosome pair is abnormal in an individual with Turner’s Syndrome? ________

10 12 13 14 15 16 17 18 8 19 21 22 Normal male; a normal ale would look the same except she would have two XX and no Y 10 12 13 16 17 14 15 18 8 8 19 20 21 22

Solution

1. Diploid number of chromosome normal karyotype - 46

2. Diploid number of chromosomes for Klinefelter’s Syndrome - 47. This is a genetic disorder due to presence of extra X chromosome.

3. Down Syndrome - chromosome 21. Also called trisomy of 21. This is a genetic disorder due to presence of extra chromosome number 21. The affected person become small round head, palm is broad, mental development retarded.

4. Turner’s Syndrome - Absence of 1 of the X chromosome. Female become sterile, lack of secondary sexual characters.

	Autosome (n)	X	Y	Total
Normal Male	42	2	2	46
Normal Female	42	4	-	46
Klinefelters	42	3	2	47
Down syndrome	43	2	2	47
Turner syndrome	42	3	-	45