Achondroplasia Achondroplasia is an autosomal dominant disorder. A newly wedded couple finds after genetic screening that they are both heterozygous for alleles responsible for that genetic disorder. Use this information to answer the following question(s). In the example above, what is the couple's chance to have a heterozygous child?
Answer: 50%
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Essay on the Principle of Population, written by Thomas Malthus in 1798, influenced Darwin's thoughts as he struggled to understand what mechanisms could be at work to produce evolution. Malthus proposed that populations of animals and plants, including humans,
A. evolved from mainland to islands, thus explaining why the island flora and fauna resembled the mainland species so closely. B. decreased arithmetically in numbers while the nutrients available increased geometrically. C. increased arithmetically in numbers while the nutrients available only increased geometrically. D. increased geometrically in numbers while the nutrients available only increased arithmetically. E. increased geometrically in numbers while the nutrients available increased arithmetically.
The diverse topography of mountainous regions generally supports more species of plants and animals than the consistent terrain of flatlands
Indicate whether the statement is true or false
What is the purpose of the waxy cuticle in plants?
a. It prevents desiccation. b. It prevents transpiration. c. It prevents diffusion of gases. d. It prevents the transport of nutrients. e. It prevents the internal transport of water.
A reflex pathway is the simplest pathway because it _____.
A. involves only one synapse B. is evaluated and integrated by the medulla, not the cerebrum C. does not involve conscious thought or learning D. does not involve the central nervous system in any way E. involves only one neurotransmitter