There are three alleles controlling the ABO blood types. IA and IB are codominant genes so that the combination IAIB produces the AB blood type. The third allele, i, is recessive to the other two alleles. Which of the following combinations of parents (with blood types on the left) and child (with blood type listed on the right) is NOT possible?
A. A ´ AB = B
B. A ´ O = A
C. A ´ B = O
D. A ´ AB = O
E. A ´ AB = B
Answer: D
You might also like to view...
The ideal environment for the growth of fungi, such as mushrooms, is
a. damp and dark. b. damp and light. c. dry and dark. d. dry and light
____ tissue allows the body to detect and respond to internal and external changes
a. Nervous b. Adipose c. Epithelial d. Connective e. Skeletal muscle
Caenorhabditis elegans is a favorite for genetic
studies because of all of the following EXCEPT a. it has the same tissue types as larger animals. b. it is transparent. c. it has only 959 cells. d. it reproduces quickly. e. they can be cut in half and used in experiments.
Which DNA methyltransferase (DNMT) is important in maintaining DNA methylation patterns during DNA replication?
A) DNMT3b B) DNMT3a C) DNMT1 D) DNMT2 E) DNMT 1 and DNMT3a