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Genetics I

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Flashcards on Genetics I, created by J yadonknow on 27/02/2018.
J yadonknow
Flashcards by J yadonknow, updated more than 1 year ago
J yadonknow
Created by J yadonknow almost 7 years ago
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Question Answer
What organism did Gregor Mendel experiment on? Pisum sativum
How do you ensure self-fertilisation doesn't occur? Remove stamens with scissors Brush sperm-bearing pollen from one plant to egg-bearing carpel of another
What is required of the parents? That they're true-breeding for the trait in question.
Draw a simple monohybrid cross for a single trait P generation F1 generation F2 generation
What is a unit of inheritance both parents contribute equally to offspring in sex repro organisms, giving one unit each. Each unit is a genetic LOCUS and broadly corresponds to a GENE
What do each gamete contain? A copy of each gene
What is the name of the alternative forms of a gene? Allele
What is the genotype? The combination of alleles present
What is Mendel's 1st law? The principle of Independent segregation (Draw a simple cross diagram of phenotypes)
Make a chi squared test for the observed/expected flowers Observed = 705 purple = 224 white x^2=0.39075
What is Mendel's 2nd law? Independent assortment 2 traits dihybrid inheritance
How can the 9:3:3:1 ratio occur? Only if the probability of inheriting a specific allele of one locus affects the probability of inheriting a specific allele of the other locus.
Name some chromo numbers boi Human: 23 per gamete 23,000 genes in genome Peas: 7 p gamete Drosophila melanogaster 4 c.elegans 3
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