Hemophilia became known as the “Royal disease” after it suddenly cropped up in some of the descendents of Great Britain’s Queen Victoria and spread through the royal families of Europe. Queen Victoria and her husband Prince Albert had 9 children – 5 girls (Beatrice, Victoria, Alice, Helena, and Louise – none of whom were hemophiliacs) and 4 boys (Edward, Alfred and Arthur had normal blood clotting; their son Leopold, however was a hemophiliac). Beatrice married a man named Henry and they had four children (sons Leopold and Maurice who were hemophiliacs, daughter Eugenie who was not a hemophiliac, and another son who was also not a hemophiliac). Eugenie married Alfonso XIII of Spain (non-hemophiliac) and they had 6 children (2 normal sons, 2 normal daughters and 2 hemophiliac sons). One of those normal sons married a non-hemophiliac woman and gave birth to one son – a non-hemophiliac they named Juan Carlos (the reigning King of Spain). Draw your pedigree for Case Study #4

Plz ! a frog has a genetic mutation in skin cells that causes part of its skin to turn orange the frog will not pass this genetic mutation onto its offspring because, a. the offspring will inherit skin cells from the other parent. b. mutated skin cells cannot divide and produce daughter skin cells. c. skin cells do not contribute genetic material to sex cells. d. parents do not contribute genetic material to their offspring.

In a hypothetical breed of dogs, coat color is controlled by two genes. there are six different coat colors in this breed: black, brown, cream, gray, silver, and tan. consider the following crosses. cross 1: black females from a lineage of all black dogs are crossed with brown males from a lineage of all brown dogs. f1 males and females are all black. when f1 are intercrossed, f2 males and females are black or brown. cross 2: black females from a lineage of all black dogs are crossed with tan males from a lineage where all males are tan and all females are cream. f1 males are black, f1 females are gray. when f1 are intercrossed, f2 males and females are black, brown, gray, or tan. cross 3: silver females from a lineage where all females are silver and all males are gray are crossed with brown males from a lineage of all brown dogs. f1 males and females are all gray. when f1 are intercrossed, f2 males are black, brown, gray, or tan, f2 females are cream, gray, silver, or tan. select the correct statements regarding the mode of inheritance of the coat color genes. a) both genes are x-linked. b) both genes are autosomal. c) one of the genes modifies the expression of the other gene. d) each gene has an additive effect on the intensity of coat color. e) each gene independently specifies three colors. f) one of the genes is autosomal, and the other is x-linked.

Which statement is true for bacteria a. bacteria have complex internal structures b. all bacteria are spiral in shape c. all bacteria cause disease in animals d. bacteria break down some foods