What happens during human reproduction?

Fertilization happens high up in the Fallopian tube. If a sperm penetrates the egg, an embryo will begin to form. This happens through cell division: one cell becomes two, which become four, which become eight, and so forth. i hope this is helpful!

If I'm incorrect please comment below :P

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

there is no stairs in bungalow

explanation:

can i have brainliest i need one