If Hani has type A blood and his mother has type B blood, which of the following is the most likely genotype of Hani's father?
A) IAIA B) IBi C) ii D) IBIB
Answer: A
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A double-stranded DNA molecule contains a total of 120 purines and 120 pyrimidines. This DNA molecule could be composed of _____
A) 120 adenine and 120 uracil molecules B) 120 thymine and 120 adenine molecules C) 120 cytosine and 120 thymine molecules D) 120 adenine and 120 cytosine molecules E) 120 guanine and 120 thymine molecules
When cells stop responding to normal controls over growth and division they
a. begin to form a tumor. b. produce a malignancy. c. start to die. d. kill surrounding cells. e. produce scar tissue.
A breeder of cattle has a herd of white cows and a roan bull. Hair color in this breed is controlled by an
incompletely dominant gene. The two homozygous forms are either red or white, and the heterozygous is roan. (a) What colors of calves are expected and in what proportions? (b) Outline a procedure to develop an all-red herd. What will be an ideal response?
Which of the following are most closely related
according to the most modern hypothesis of animal evolutionary relationships? a. arthropods and roundworms b. mollusks and tardigrades c. annelids and cnidarians d. chordates and flatworms e. echinoderms and mollusks