cell division Flashcards
stage 1 of cell cycle
cells grow, replicate their DNA, make more sub cellular structures
stage 2 of cell cycle
mitosis: one set of chromosomes is pulled to each end of the dividing cell and the nucleus divides
stage 3 of cell cycle
cytoplasm and cell membrane divide to form two new identical cells
how any chromosomes in the human body
23 pairs
46 chromosomes
one from mother one from father
cloning
producing genetically identical offspring
stem cells
unspecialised cells that are found in the human embryo and bone marrow
zygote
egg and sperm fusing together
inner layers of the ball are embryonic stem cells
human stem cells can help treat…
paralysis
macular degeneration in the eye
diabetes, producing cells that are sensitive to blood sugar
benefits of cloning plants
rare plants can be saved from extinction
scientific research
plants produced with special features
negative views on stem cell research
concern could cause cancer
violation of the embryos rights
religious objection- shouldn’t interfere with the natural process of reproduction
waste of money
therapeutic cloning
human stem cells can be made to differentiate into many types of cell- could treat conditions like paralysis