Genetics I

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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	Created by J yadonknow over 6 years ago