What is the probability of a child having a recessive disorder if both parents are heterozygous carriers? A. 1/2 B. 1/4 C. 3/4 D. 2/3 E. Zero

In humans, unattached earlobes (E) are dominant to attached earlobes (e). If a child is born with unattached earlobes, and a mother with attached earlobes, and a dad with unattached earlobes, what is genotype of the dad? O a. EE or Ee O b. ee O c. Ee O d. Ee or ee O e. EE

What is the likely mode of inheritance in the below pedigree?   Select one: a. Dominant b. Recessive c. There is not enough information to determine dominant or recessive modes of inheritance.

show  a cross between a woman with blood type o and a man who is heterozygous blood type b. Using mendels rules. What is the percent chance that the child has blood type o?