What are the letters for alleles?
You decide that. All you have to do is define them before you start. The dominant gene is denoted by a capital letter, the recessive one by a lower case letter. It is better to pick a letter which has different forms for the capital and lower case letters (like A and a; not S and s).
Actually, there aren't specific letters. The letters depend on the alleles. For example, if the alleles are A and a, then Aa would be heterozygous, since hetero means different. Homozygous, however, would be two of the same alleles, since homo means same. The homozygous would be AA or AA in this example. hope this helped!
The letters on the outside of the Punnett square stand for the alleles of each parent. One parent's alleles are written across the top of the square, and the other parent's alleles are written along the left side of the square. The pairs of alleles inside the square represent all the possible genotypes for their offspring.
Dominant alleles carry traits or characteristics that will show no matter what. Recessive alleles carry traits where you must be homozygous for the recessive trait in order for it to show. Dominant alleles are represented by capital letters (EX: R or M) Recessive alleles are represented by lower case letters (EX: r or m) In order for a dominant allele to show, you can have either RR or Rr, since it is dominant. However, in…
Dominant alleles are expressed regardless of any other alleles. Recessive alleles are not expressed if a dominant allele is present. Dominant alleles are written with capital letters (eg. B or T), recessive with lower case letters (eg. b or t). Dominant - if B codes for black fur - BB and Bb will both end up with black fur. Recessive - if b codes for white fur, only bb will result in white fur.
Question # 1. The letters on the outside of a Punnett square stand for the parent alleles. The alleles are represented by upper case letters and lower case letters, depending on the dominance or recessiveness of a trait. Punnett squares can be as simple as four boxes or as complex as thirty-six boxes. When filling in a Punnett square one should place the parent the two parents at the top and the left side and…