classical genetics - mwit · crossing over gametes genetic inheritance
TRANSCRIPT
https://scratchcradle.files.wordpress.com/2012/07/inheritance2.jpg
Crossing over
Gametes
Genetic inheritance
https://apbio2-chs-09.wikispaces.com/file/view/genes.gif/83602113/315x289/genes.gif https://ka-perseus-images.s3.amazonaws.com/a52d3db827139d38b820449e76ae9358f24b404a.png
http://i2.wp.com/thingsitellmymom.com/wp-content/uploads/2015/03/allele.jpg
ALLELES : gene + location
Chromosome from Dad
Chromosome from Mom
Phenotype A and B are polymorphisms of a gene expression
Phenotype, Genotype, Dominant trait, Recessive trait, Homozygous, Heterozygous
Chromosome 1 @ metaphase I
Allele of phenotype cleft chin
Allele of phenotype
no cleft
CC cc
c c C C
Heterozygous; Cc Homologous chromosome
https://cdn.education.com/files/static/science-fair/biology_it-takes/punnett-square-traits-diagram.png
https://upload.wikimedia.org/wikipedia/commons/2/2e/Mendels_peas.png
Pea
https://cdn.dtbrownseeds.co.uk/product-images/op/z/10150z.jpg
Short life Apparent characters
https://ka-perseus-images.s3.amazonaws.com/1d332b8f35d27ca033bd25ed9aa1f7470344cd80.png
Crossing fertilization
Homozygous (purple) x Homozygous (white)
Heterozygous (?)
https://dr282zn36sxxg.cloudfront.net/datastreams/f-d%3A6354a47b29926c7610584b8fa9bfc69cebaef63334cc5c62eea286a8%2BIMAGE_THUMB_POSTCARD_ TINY%2BIMAGE_THUMB_POSTCARD_TINY.1
Why?
F&P
https://sholtoainslie.files.wordpress.com/2011/09/mendel.jpg
Which is dominant trait?
Which is recessive trait?
Why does any ratio closely with 3:1?
http://s3-ap-southeast-1.amazonaws.com/subscriber.images/biology/2016/09/29120616/Monohybrid-cross-F1-generation.png https://s3-ap-southeast-1.amazonaws.com/subscriber.images/biology/2016/09/29120634/Monohybrid-cross-F2-generation.png
Monohybrid cross
Law of segregation
Only one “P” from purple parent was send to F1 generation. As same as, only one “p” from white parent was send to F1 generation.
Test cross
https://online.science.psu.edu/sites/default/files/biol011/Fig-6-8-Testcross-Outcomes.jpg
Homozygous recessive
Dihybrid cross
http://ib.bioninja.com.au/_Media/dihybrid-cross-2_med.jpeg
Law of independent assortment Genes (alleles) on different chromosomes could be move to the same gamete.
https://cdn.thinglink.me/api/image/896466991580184578/1240/10/scaletowidth
Law of independent assortment
How many gamete type of Aa?
How many gamete type of AaBb?
How many gamete type of AaBbCc?
How many gamete type of AaBbCcDd?
How many offspring genotype of Aa x Aa?
How many offspring genotype of AaBb x AaBb?
How many offspring genotype of AaBbCc x AaBbCc?
How many offspring genotype of AaBbCcDd x AaBbCcDd?
How many offspring phenotype of Aa x Aa?
How many offspring phenotype of AaBb x AaBb?
How many offspring phenotype of AaBbCc x AaBbCc?
How many offspring phenotype of AaBbCcDd x AaBbCcDd?
What is a phenotype ratio of Aa x Aa?
What is a phenotype ratio of AaBb x AaBb?
What is a phenotype ratio of AaBbCc x AaBbCc?
What is a phenotype ratio of AaBbCcDd x AaBbCcDd?
https://online.science.psu.edu/sites/default/files/bisc002/PunnettSquare.jpg
Monohybrid Dihybrid
Punnett square
AaBb x AaBb
Bb x Bb
https://i0.wp.com/www.rtgmin.org/wp-content/uploads/2012/06/punnet-square.jpg
AA x aa
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTQGEMQ2jbBA6Wdu8ojuSBtrJECIEnhggPUC4nzo-OPmmEqRMbI
Branch diagram
https://upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Dihybrid_Cross_Tree_Method.png/450px-Dihybrid_Cross_Tree_Method.png