Genotype:
-The genotype is the part so the genetic make-up of a cell
-Genotype is one of the three factors that determine phenotype
-Geneticists use two additional terms to describe an organism's Genotype homozygous and heterozygous
-Genotype is an organism's alleles
-An example of a Genotype is petal color in a pea plant
-The genotype is the part so the genetic make-up of a cell
-Genotype is one of the three factors that determine phenotype
-Geneticists use two additional terms to describe an organism's Genotype homozygous and heterozygous
-Genotype is an organism's alleles
-An example of a Genotype is petal color in a pea plant
Phenotype :
-The phenotype of an organism is the whole set of characters ( or traits ) of that organism
- Phenotype is important because it is exposed to natural selection
- Phenotypes are determined mainly by genes and are influenced by environmental factors
- Example - a beaver dam might be considered a phenotype of beaver genes
Mendel experiment :
-In all his crosses, Mendel found that only one form of the trait appeared in the F1 generation. However, in the F2 generation, the"lost " form of the trait always reappeared in about one fourth of the plants
-In the F1 generation Mendel found a suprise, which was all the offspring were tall. The shortness trait seemed to disappeared
-The F2 generation suprised Mendel even more. He counted the plants of the F2 generation. About three-fourths were tall, while one-fourth were short
-In Mendel's crosses, some forms of a trait were hidden in one generation but reappeared in the next
Punnett Square :
-Punnett Square - a diagram that is used to predict an outcome of a particular cross or breeding experiment
-A Punnett Square is used by biologists to determine the probability of an offspring's having a particular genotype
-The Punnett Square shows that there are two possible genotypes of the offspring