The diagram shows genetic structures.
Which label best represents the area marked Y?
X
chromosome
protein
gene
DNA

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins

What type of pollution does household garbage cause

Choose the correct words to complete the sentences related to genetic screening. is a procedure that is used during pregnancy to detect genetic defects. is extracted from the uterus and used to identify genetic disorders?