Question

study the karyotypes below in figures 7 - 6 and 7 - 7. notice the chromosomal errors circled on each karyotype that indicates turner syndrome in figure 7 - 6 and klinefelter syndrome in figure 7 - 7. practice 1 study each karyotype given below. in the blank below each karyotype, label as one of the following: normal male, normal female, down syndrome, turner syndrome, or klinefelter syndrome.

Explanation:

Normal males have 46 chromosomes with an XY sex - chromosome pair. Normal females have 46 chromosomes with an XX sex - chromosome pair. Down syndrome is characterized by an extra copy of chromosome 21. Turner syndrome is when a female has only one X chromosome (45,X). Klinefelter syndrome is when a male has an extra X chromosome (47,XXY).

1. This karyotype has 46 chromosomes with an XY pair, so it is a normal male.
2. This karyotype has 47 chromosomes with an extra chromosome 21, so it is Down syndrome.
3. This karyotype has 47 chromosomes with an extra X chromosome (XXY), so it is Klinefelter syndrome.

Answer:

1. normal male
2. Down syndrome
3. Klinefelter syndrome