You can us the Principles Probability is the predict the results of a particular event.Probability is a number that describes how likely it is that an event will occur
What does probability have to do with genetics? In a Genetic cross, the allele that each parent will pass off on to it's offspring is based on Probability. Ex. Their are 4 possible combinations of alleles. The probability that an offspring will be RR is 1 in 4 ,or 25%. The probability that an offspring will be rr is also 1 in 4 ( 25%) but the probability that an offspring will be Rr is 2 in 4, or 50%.
The spinner has a 50% probability that the spinner will land on the thumbs up
How can you predict all the Combinations of alleles?
The way that you can predict all the combinations of alleles is by using a Punnett Square.
Step 2: Write the Male's parent alleles along the top and the female parent's alleles along the left side
Step 1:Make a square with 4 sections
Copy all the Female parent's alleles into the box at their right and copy the male's alleles into the boxes beneath them .
The completed square shows all the possible allele's combinations
A Punnett Square is a Chart that Shows all the possible combinations of aelles that can result from a genetic cross
Phenotype and genotype are 2 useful terms geneticists use.An organism's phenotype is its physical appearance, or visible traits.An organism's genotype is its genetic makeup, or allele combinations
In some cases alleles an inheritance pattern called codominance exists. In codominance the alleles are neither dominant or recessive,so both alleles are expressed in the offspring.