Fill in the Blanks TraitsOnline version traits and genes by Pam Bywater 1 Recessive Heterozygous 25 heredity top father nucleus 23 Homozygous lower Alleles case capital Dominant mother are one member of a pair or series of genes that occupy a specific position on a specific chromosome . alleles have more of a say in what the outcome of that cross is going to be . alleles have little to no say unless there are two recessives that are available . In each of the crosses there is one allele from the and one allele from the . Each of the squares in a Punnett square is a probability and each of those squares are one fourth or percent . Generally people put the father or male allele on of the Punnett square . In any relationship for a Punnett square a letter is going to be for the dominant . The little or letter is for the recessive . means that you have two different alleles for that trait . means that you have two alleles that are the same . Genes are found in the of the cell . Each parent contributes pairs of chromosomes . Transmission of traits from parents to offspring is called .