In people, a dimpled chin is an autosomal dominant trait. Many famous celebrities, such as John Travolta and Michael and Kirk Douglas, have this condition
Assume that the wrestler and actor Hulk Hogan is homozygous for the dimpled chin, and he married a woman with a round chin. They had two children, Brooke and Nick.
What is the probability that their children will show the trait?
A) 75% B) 25% C) 50% D) 0% E) 100%
E
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On a phylogenetic tree, each node (branchpoint) represents a divergence event, and the length of the branches represents the number of molecular changes that have taken place between the nodes.
Answer the following statement true (T) or false (F)
What are the two most important nutrients affecting production in aquatic ecosystems?
A. oxygen and hydrogen B. carbon and oxygen C. carbon and iron D. nitrogen and phosphorus E. carbon and calcium
In contrast to predation, a parasite usually
a. does not kill the animal on which, or in which, it lives. b. kills its host. c. is a short-term visitor. d. is larger than its host. e. does not kill the animal on which, or in which, it lives and is larger than its host
Cryptosporidium parvum
A. Belongs to the phylum Retortamonada; extracellular; located in the small intestine; asexual reproduction; direct life cycle B. Belongs to the phylum Apicomplexa; intracellular; located in the blood; sexual and asexual reproduction; indirect life cycle C. Belongs to the phylum Apicomplexa; intracellular; located in the small intestine; sexual and asexual reproduction; direct life cycle D. Belongs to the phylum Retortamonada; intracellular; located in different body tissues; Aasexual reproduction; indirect life cycle