What is true about sex chromosomes? A. They carry genes for traits including those not related to sexual
characteristics.
B. In humans, both types of sex chromosomes are the same size.
C. A daughter receives both copies of her sex chromosomes from
her mother
D. They do not sort independently during meiosis.

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Does masterbation affect height growth or loss of growth hormone?

Some scientists argue that global warming is related to buming fossil fuels to produce energy o increased use of fertilizers loss of forested areas a of the above