Why are individuals with Turner syndrome always female and individuals with Klinefelter syndrome always male?
What will be an ideal response?
Individuals with Turner syndrome have an X chromosome but no Y chromosome. Since the genes that produce "maleness" are on the Y chromosomes, these individuals will always be female. Individuals with Klinefelter syndrome have two X chromosomes but also have one Y chromosome. The presence of the Y chromosome will generate the male traits regardless of the number of X chromosomes.
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________ is the total of all chemical reactions occurring in the cell.
Fill in the blank(s) with the appropriate word(s).
Even the replication of DNA and the expression of genes depend on the action of ____________________. Fill in the blank(s) with the appropriate word(s)
Refer to the accompanying figure in terms of a freshwater environment. What is the function of the structure labeled
as A?
a. salt uptake
b. water gain by osmosis
c. drinking
d. removal of salts and nitrogenous wastes from the blood
e. release of nitrogenous wastes
Why are native plants important for butterfly populations?
a. Larvae often will not eat non-native plants b. Adult butterflies will not eat nectar from non-native plants c. Pupae cannot hang properly from non-native plants d. All of the above