More Dihybrid Crosses

In a dihybrid cross, when two traits are considered, the number of possible combinations in the offspring increases. Suppose that black hair (B) is dominant over blond hair (b) and brown eyes (E) are dominant over blue eyes (e).1. The father is heterozygous for black hair and heterozygous for brown eyes. The mother has blonde hair and blue eyes. 1. First, write the GENOTYPE of father and mother on a piece of paper using the above information.2. Second, write the father's and mother's gametes using the FOIL method.3. Last, complete the punnett squares below. GAMETES BE Be bE be be BbEe Bbee bbEe bbee be BbEe Bbee bbEe bbee be BbEe Bbee bbEe bbee be BbEe Bbee bbEe bbee 2. Write is the ratio of the offspring that could be expected to have blonde hair and blue eyes. 4 OR1 3. Both parents are heterozygous for black hair and heterozygous for brown eyes. 1. First, write the GENOTYPE of father and mother on a piece of paper using the above information.2. Second, write the father's and mother's gametes using the FOIL method.3. Last, complete the punnett squares below. GAMETES BE Be bE be BE BBEE BBEe BbEE BbEe Be BbEe BBee BbEe Bbee bE BbEE BbEe bbEE bbEe be BbEe Bbee bbEe bbee 4. Write is the ratio of the offspring that could be expected to have blonde hair and blue eyes. Black hair Brown eyes: 9 hair blue eyes: 3 hair Brown eyes: 3 hair Blue eyes: 1 Scientists at Bikini Bottom have been investigating the genetic makeup of the organisms in this community. Yellow body (Y) color is dominant to blue (y) and Square shape (S) is dominant to round (s).5. Spnoge Bob Square Pants is heterozygous for both his yellow color and his square shape. He marries Sponge Sussie Round Pants who is blue in color with a round shape. Complete the dihybrid cross below to determine the genotypic and phenotypic ratios of their offspring. 1. First, write the GENOTYPE of father and mother on a piece of paper using the above information.2. Second, write the father's and mother's gametes using the FOIL method.3. Last, complete the punnett squares below. GAMETES YS Ys yS ys ys YySs Yyss yySs yyss ys YySs Yyss yySs yyss ys YySs Yyss yySs yyss ys YySs Yyss yySs yyss 6. Write the genotypic and phenotypic ratios of their offspring from the above punnett square. Phenotypic Ratio: 4 Yellow and Square with a _YySs_ genotype 4 Blue and Square with a yySs genotype 4 Yellow and Round with a Yyss genotype 4 Blue and Round with a yyss genotype