OK So we r learning about HGD AND THE body parts and crap.So how do u do the box thing when you are determinig the color of the eyes or hair. Like the phenotype.... and ya... How do u do that??
http://www.athro.com/evo/gen/punexam.html
Thanks man.
To determine the phenotypes of certain traits, such as eye color or hair color, you can use a tool called a Punnett square. A Punnett square is a visual representation that helps determine the possible combinations of alleles (gene variants) that an individual can inherit from their parents.
To use the Punnett square, follow these steps:
1. Identify the alleles: Determine the alleles that each parent carries for the trait you're interested in. For example, let's consider the eye color trait, with "B" representing the dominant allele for brown eyes and "b" representing the recessive allele for blue eyes. If one parent has brown eyes and carries the genotype "Bb" (one dominant allele and one recessive allele), and the other parent has blue eyes with the genotype "bb" (two recessive alleles), we can denote them as follows:
Parent 1: Bb
Parent 2: bb
2. Set up the Punnett square: Draw a 2x2 grid divided into four squares. Label the top row with one allele from each parent and the left column with the other allele from each parent. In our example, the Punnett square would look like this:
| B | b |
-----------------
B | | |
-----------------
b | | |
3. Fill in the squares: Combine each allele from the top row with each allele from the left column to fill in the squares. In our case, we would combine "B" from Parent 1 and "b" from Parent 2 to fill in the top right square, and "b" from Parent 1 and "b" from Parent 2 to fill in the bottom right square:
| B | b |
-----------------
B | BB | Bb |
-----------------
b | Bb | bb |
4. Determine the phenotypes: Now, analyze the Punnett square to determine the possible genotypes and phenotypes of the offspring. The capital letters represent the dominant alleles (brown eyes), and the lowercase letters represent the recessive alleles (blue eyes). In our example, the possible genotypes are BB, Bb, Bb, and bb. The corresponding phenotypes would be brown eyes for BB and Bb, and blue eyes for bb.
The Punnett square allows you to visualize the possible combinations of alleles and predict the inheritance patterns of specific traits. You can refer to the diagram you provided (http://www.athro.com/evo/gen/punexam.html) to see a visual example of how to fill in a Punnett square for different traits.