biology b5 groteh and devlopment
- Created by: Anna Wood
- Created on: 20-06-13 09:37
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- b5 growth and development
- meiosis
- tasks place in testis or ovaries
- makes gametes
- has only half chromosomes
- makes gametes
- creates 4 different gametes
- used for sexual reproducing
- tasks place in testis or ovaries
- miosis
- mitosis occurs when
- growth
- repair
- replace
- diversion of cells tom make not cells
- makes 2 identical daughter cells
- for mitosis to take place the cell goes through growth and division
- growth
- number of organelles increase
- chromosomes are copied
- two strands of dna separate new stands form alongside
- division
- copied chromosome separate
- cell divides
- growth
- variation
- meiosis and sexual reproduction creates variation
- when gametes fuse genetic information from two individuals combined
- only one of parents allelesis passed on
- each offspring can have different combination
- each offspring is different
- each offspring can have different combination
- mitosis occurs when
- fertilisation
- male gamete and female gamete fuse together to produce a single body cell
- zygote is formed
- had full number of chromosomes
- in each new pair of chromosomes
- one from farther
- one from mother
- in each new pair of chromosomes
- divides by mitosis
- cluster of cells are called a embryo
- finally turns into a baby
- cluster of cells are called a embryo
- had full number of chromosomes
- zygote is formed
- male gamete and female gamete fuse together to produce a single body cell
- genetic information
- genes control characteristics by providing information
- instruction are formed a code
- made up of four bases
- hold two stands of dna in a double helix
- a always pairs with t
- g always with c
- made up of four bases
- instruction are formed a code
- each gene is a code for specifics protein
- they join in thee in this call triplet
- each of these triplet sort out a amino acid
- they join in thee in this call triplet
- genes control characteristics by providing information
- controlling growth and development
- dna is too large to leave nucleus
- so stay inside nucleus
- the production of protein happens in cytoplasm
- the transfer is done in the following way
- the relevant section of dna is unzipped
- instruction are copied onto smaller molecues
- these smaller molcules are called messenger RNA
- these molecules leave the nucleus
- carrying information to the ribosome
- when the protein is made
- carrying information to the ribosome
- these molecules leave the nucleus
- these smaller molcules are called messenger RNA
- instruction are copied onto smaller molecues
- the relevant section of dna is unzipped
- the transfer is done in the following way
- dna is too large to leave nucleus
- meiosis
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