The correct answer would be
C.) <span>Polio Vaccination.</span>
The answer to your question is,
Seafloor spreading
-Mabel <3
<span>starfish
</span> All normal eggs from the mother have an X chromosome while usually half the sperm cells from the father have a Y (male) chromosome and the other half have an X (female) chromosome and it is therefore the father's sperm that dictates which gender the embryo will take.
If the egg is fertilized by a sperm with a Y chromosome then the embryo will be a genetic male due to XY chromosome combination.
<span>If the egg is fertilized by a sperm with an X chromosome then of course the embryo will be a genetic female due to XX chromosome combination.</span>
The student may look for a plant wall, because cell walls are present only in plant cells.
