Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: genetic variation
Description: this is a write up of the different the different typesof genetic variation plus more, this is merit work at a level 3 extended diploma of animal management.
Description: this is a write up of the different the different typesof genetic variation plus more, this is merit work at a level 3 extended diploma of animal management.
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
Variation
Variation in genetics refers to the differences found in the same species, it refers to how
different attributes arise from different coding
...
the reasons for these differences lie within the
alleles,phenotypes and genotypes
...
Environmental variation is derived from the environment, evolution is a key indicator of
environmental variation
...
files
...
com/2013/11/20130722145110meiosis
...
Interphase is the period before a cell divides, it
prepares the cell for division by growing and replicating DNA and other cell functions
...
During metaphase 1 the pairs of homologues chromosomes move toward the middle of the cell
or the equator
...
Cytokinesis is where one cell splits and divides into two daughter cells
...
The first stage in the second section of meiosis
...
During prophase 2 the chromosomes start to tighten up and the cell’s nucleus begins to show
under a microscope
...
In the middle of each chromosome are centromeres
...
This happens during metaphase 2
...
During telophase the ultimate stage in cell division, the nucleus dissipates to the eye, the
spindle fibres dissolve in the cell, and cytokinesis end the cell division process all to start from
the top again with a new cell
...
Crossing over happens when homologous chromosomes come together in late prophase 1 on
occasion if the chromosomes come together too fast they will become tangled and twisted
...
Proving a development of new inheritance
...
g
...
Mendel’s laws are split into two
...
g
blonde hair and brown hair
...
So in theory brown hair is ‘BB’ and blonde hair
is ‘bb’ when these two chromosomes come together they will form ‘Bb’ and the hair will be
brown
...
If one of your
parents had the genotype AABB you would inherit AB as you inherit the two sections of your
parent
...
Gametes are formed through
meiosis and cant be formed in other ways,glucose (a molecule) is fermented into simple organic
acids
Spermatogenesis is produced in the testes up to 300 million per day yet only 100 million turn
into sperm
...
Monohybrid is a cross in which traits from both parents is adopted by the offspring
...
Recessive recessive is the opposite to dominant it is weaker than the dominant gene so if a
blonde person and a brunette person were to have a child the child would have brunette hair
because brunette is dominant
...
Gene interaction gene interaction also known as epistasis is the interaction between non allelic
cells
...
Multiple alleles is where a
trait is adopted by more than one chromosomes
...
Sex linked is a gene found on either an X
chromosome or a Y chromosome
...
A monohybrid is a cross in which one trait from both parents are adopted by the offspring
...
There are two big differences in gamete production in males and females
...
Crossing over is the process of the ‘arms’ linking up with each other influencing unique
characteristics this works with the random sorting of the chromosomes
...
Above is a diagram for a dihybrid genetic variation
Title: genetic variation
Description: this is a write up of the different the different typesof genetic variation plus more, this is merit work at a level 3 extended diploma of animal management.
Description: this is a write up of the different the different typesof genetic variation plus more, this is merit work at a level 3 extended diploma of animal management.