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Basic Genetics (genotype, phenotype, punnett squares)

physical characteristics that show up phenotype
Used to predict possible genotypes for offspring of two parents Punnett Square
What is a trait? a physical characteristic studies in genetics
What controls traits? genes
Cross a homozygous red rose (RR) with a homozygous white rose. (rr) What is the probability that you will have a red rose? 100%
How many chromosomes do humans have? 46
How many chromosomes are in a human's sex cells 23
With sexual reproduction offspring- will have a combination of the two parents' genes
With asexual reproduction offspring- are identical to the parent
Heterozygous having two different alleles for one trait
Homozygous having two identical alleles for a trait
Dominant Will always show up if it is present
Recessive Will only show up if there are two
Heredity is- the passing of genetic information from one generation to another
If tall flowers (T) are dominant to short flowers (t)-what is the probability of producing a tall flower if you cross two heterozygous flowers (Tt)? 3 out of 4 or 75%
What are alleles? different forms of a gene
actual genes an organism has for a particular trait (shown by letters) genotype
Created by: dykesg



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