When the gene for one trait exists as only two alleles & the alleles play according to Mendel’s Law of Dominance, there are 3 possible genotypes (combination of alleles) & 2 possible phenotypes (the dominant one or the recessive one).
What are the different combinations of alleles?
Within an individual organism, the specific combination of alleles for a gene is known as the genotype of the organism, and (as mentioned above) the physical trait associated with that genotype is called the phenotype of the organism.
What are the three alleles?
The ABO system in humans is controlled by three alleles, usually referred to as IA, IB, and IO (the “I” stands for isohaemagglutinin). IA and IB are codominant and produce type A and type B antigens, respectively, which migrate to the surface of red blood cells, while IO is the recessive allele and produces no antigen.
How many different allele combinations are in RrYY?
|Organism that have two identical alleles for a particular trait are said to be?||Homozygous|
|A punnett square shows?||Probable outcomes of genetic crosses|
|How many different allele combinations would be found in the gametes produced by a pea plant whose genotype was RrYY?||Two|
How many different gamete combinations are there?
Humans have 23 pairs of chromosomes. That means that one person could produce 223 different gametes. In addition, when you calculate the possible combinations that emerge from the pairing of an egg and a sperm, the result is (223)2 possible combinations.
What do multiple alleles mean?
: an allele of a genetic locus having more than two allelic forms within a population.