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Mendel and Genetics

Laws of Genetics, Punnet Squares and Probability

QuestionAnswer
Who was Gregor Mendel? A monk now known as the Father of Genetics.
What type of organism did Mendel work with? Pea plants
A variation or type of a trait is called a(n) Allele
The trait that always shows itself when present is called: Dominant
The trait that is sometimes masked and is only shown when it is homozygous is called: Recessive
In pea plants, tall is a______ trait. Dominant
If a pea plant is homozygous dominant for height,the letters would be: TT
If a pea plant is heterozygous for height the letters would be: Tt
If a pea plant is homozygous recessive for height, the letters would be: tt
What is the phenotype for a plant that is TT? Tall
What is the phenotype for a plant that is tt? Short
What is the phenotype for a plant that is Tt? Tall
If you cross a pure bred dominant and a pure bred recessive, all the offspring will be: Hybrids
An organism with one dominant and one recessive trait is a: Hybrid
Mendel found that if you crossed a two hybrids, the resulting ratio of dominant to recessive would always be: 3 to 1
In a test cross, you must always have one organism that is Homozygous recessive
What is the probability that you will get a homozygous recessive if you cross Gg with gg? 50%
What is the probability that you will get a homozygous dominant if you cross GG with Gg? 50%
An organism's ________________ is its genetic makeup. Genotype
An organism's _________________ is what it physically looks like. Phenotype
In blood, the trait for type A and type B are: Codominant
If someone has the allele for A blood and O blood, what will their blood type be? A
If someone has the allele for A blood and B blood, what will their blood type be? AB
If someone has two alleles for O blood, what will their blood type be? O
Created by: erica.sprague
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