Conner & Kaitlyn
Alleles & Genes
A dominant allele is the allele that masks, overpowers. A recessive allele the allele that gets masked, overpowered. Heterozygous is two alleles for the same trait that differ from each other. Homozygous is two alleles of the trait that are the same. Genotype is gene combinations of an organism. Phenotype is the way an organism looks or behaves.
A punnett square is a genetic tool used to calculate offspring probability of receiving traits. In the example to the right its crossing a yellow pea plant with a green pea plant. The phenotype for the yellow pea plant would be yellow. The genotype for the yellow pea plant would be YY, or heterozygous Yy. The phenotype for a green pea plant would be green . The genotype would be yy.
sex chromosomes are indicated by X and Y. Females are XX and Males are XY. the males controles the sex of the offspring because if he gives and X then its a girl but if he gives a Y then its a boy. sex linked traits are characteristics determined by genes on sex chromosomes. Sex-linked traits can be on the X or Y chromomsomes. but it is more common on the X.