Production Of Sex Cells Flashcards
What is spermatogenesis and oogenesis?
The formation of spermatozoa in the testis is called spermatogenesis.
The formation of ova in the ovary is called oogenesis.
Where does spermatogenesis occur?
It occurs inside the seminiferous tubules of each testis that are lined with immature cells called spermatogonia.
When does spermatogonia (immature cells) begin to divide?
At puberty.
Complete the sentence.
4 ______ spermatozoa are formed by meiosis from 1 ________ spermatogonium.
4 haploid spermatozoa are formed by meiosis from 1 diploid spermatogonium.
How long does spermatogenesis take to complete?
72 days
What is the purpose of the fluid-filled vesicles at the tip of the sperms head?
In the fluid are enzymes that break down the layer of cells surrounding the egg so that fertilisation can occur.
The middle piece of the sperm contains what? What does it provide the sperm with?
The middle piece of the sperm contains mitochondria, where respiration takes place to provide the sperm with energy for movement.
Why does sperm have a short survival period?
Because the cytoplasm around the mitochondria is so thin. They receive nourishment from the semen in which they are suspended in.
What is oogenesis and where does it occur?
Oogenesis is the production of ova within the ovaries.
