{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Biology notes Exam 3

Biology notes Exam 3 - Growth and repair How do cells...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Growth and repair: How do cells reproduce? Cells need to possess the genetic material characteristic of the organism o Genetic material is DNA o The “daughter” cells need the complete genetic complement Prokaryotes o Circular strands of DNA o Replicate the DNA and pass it on to the “daughter” cells o Divide by binary fission Eukaryotes o A problem o Genetic material is found in linear chromosomes Linear strands of DNA complexed with proteins Multiple chromosomes (ex. Humans 46) o How to insure that each daughter cell gets the complete set of chromosomes? Need a mechanism to allow each daughter cell to have a copy of each chromosome The solution o A process called mitosis Cell Division: Mitosis o Reproduction o Growth o Repair o Produce daughter cells that have identical genetic complements o Occurs in somatic cells Somatic cells o All body cells except cells which give rise to gametes
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Chromosomes o A complex of a linear strand of DNA and protein o Each eukaryotic species has a characteristic number o Found in nucleus Chromatin o The long linear strand of DNA and complexed proteins Duplicated Chromosomes o Consists of two sister chromatids o Identical copies of DNA o Attached at a specialized region called the centromere Cell division for gamete formation o Sexual reproduction Fusion of gametes from parents to form a zygote Greater diversity of offspring than asexual reproduction
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}