During the act known as "sexual intercourse", the male penis goes inside the female vagina, where (usually after moving back and forth for a while, to get excited), the semen (the liquid which includes the sperm cells) is deposited inside the woman's body.
Nothing - but it earlier deposited sperm cells at the cervix of the uterus.
the penis
Why are there generally more eggs and sperm cells produce during external fertilization thean internal fertilization
Yes, because in mammals, internal fertilization is done through copulation, which involves the insertion of the penis into the vagina.
During fertilization the sperm unites with the egg. This typically occurs in the fallopian tube.
Gametes fuse together during fertilization.
Not the least
genotype
No. Fertilization is the joining of an egg and sperm.
No, there is no ovulation when pregnant.
Semen or sperm
Fertilization is internal in reptiles, birds, and mammals.
Penis length is essentially unrelated to fertility. In fact, even with no penetration into the vagina, it is possible for some sperm to make their way into the uterus and fertilize an egg.