When the nucleus of an egg joins the nucleus pf a sperm?

Aboy with an extra x chromosome probably has which of the following syndromes?

At which location in earth’s interior does the top density continue to increase as thickness decreases?

What would most likely happen if a person increased the amount of saturated fat in his or her diet? the person's risk of cardiovascular disease would increase. the person's risk of cardiovascular disease would decrease. the person's bad cholesterol would decrease. the person’s good cholesterol would increase.