For the trait that is coded by a recessive allele to be expressed, the must be homology, which means that an offspring has to inherit that recessive allele from both its parents.
A dominant allele will dominate over the recessive allele, so for the trait coded by a dominant allele to be expressed, the offspring only needs to inherit the allele from one of its parents.
For example: "R" is brown eyes, "r" is blue eyes.
Now you get one R from each of your parents.
RR (homozygote) = brown eyes
Rr (heterozygote) = brown eyes
rr (homozygote) = blue eyes
B because it a matched with T the first one would be T nd the second would be A
Answer:
The genetic code only consists of 4 letters of A T C and G. That means it is a VERY simple language. Combinations of three of these letters (codons) are translated into functional information in the form of amino acids. Each three letters = one amino acid.
Although the code seems simple, the information that can be derived from it is highly complex, making an entire organisms.
Take for example a simple 4 letter sequence of letters. ACTG, AGTC, AATG, etc. There are 256 potential combinations, just in a sequence of 4. Imagine in humans where there are THREE BILLION letters! The possible combinations are essentially endless.