You have a cup of beans in front of you with 20 white beans and 20 red beans. (You can also use candy, buttons, or coins). These
beans represent the alleles for a simple Mendelian trait, where red is dominant (R) and white is recessive (r). The cup holds the alleles for an entire population (the gene pool). Assess the gene pool. How many alleles of each kind are present in your overall population?
1. Dominant: 0, Recessive: 40
2. Dominant: 40, Recessive: 0
3. Dominant: 20, Recessive: 20
4. Dominant: 20, Recessive: 0
5. Dominant: 0, Recessive: 20
An allele is the alternative of a gene. On his case, these beans represent the alleles for a simple Mendelian trait, where red is dominant (R) and white is recessive (r).
As states earlier there are 20 red beans (20 dominant alleles) and 20 white beans (20 recessive beans) and each beach represent an allele.
