Explain why rare recessive alleles are more likely to produce a recessive phenotype as a result of inbreeding
What will be an ideal response?
Negative genetic outcomes in the form of infants with recessive conditions due to inbreeding occur when a recessive allele is rare in a population. In such cases, there is a meaningful increase in the likelihood that a consanguineous mating will produce a child with a recessive phenotype. When the recessive allele frequency is q = 0.01, for example, the chance of producing a recessive homozygote from a first-cousin mating is only a few times more likely than the chance of producing a recessive homozygote by random mating.
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Which of the following groups is not a type of mammals?
A. Monotremes B. Eutherians C. Marsupials D. All of the above are types of mammals
A moth species is known for its unusual flying behavior, which includes sudden vertical drops and horizontal zigzags. Not much is known about the cause of this behavior. What could you study to better understand the proximate basis of this behavior? (Check all that apply)
Lepidopterans (moths and butterflies) sometimes have specialized flying behaviors. Some moths have the ability to do sudden vertical drops when they detect bat sonar, to avoid being eaten. Other species use special flying techniques to attract a mate. When biologists talk about the "cause" of a behavior, they may be referring to two different things. The proximate cause is the sequence of physiological events that lead to the behavior in an individual. The ultimate cause is the adaptive benefit to the animal that allowed natural selection to sculpt the behavior over evolutionary time. Understanding both the proximate and ultimate basis of behavior is important, and different types of biologists may focus on each. _____ brain structure _____ flying behavior in related species _____ hormones _____ mating behavior _____ physiology _____ predation _____ sensory organs _____ wing muscle development Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about proximate causes of a behavior? What other information is related to the question? Choose Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection on Process: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Bacteria of which shape, rarely remain attached after division and are usually only seen as single cells?
A) Cocci B) Rods C) Spiral
Gene therapy is currently used to treat all of the following diseases EXCEPT
A) severe combined immunodeficiency disease (SCID). B) Duchenne's muscular dystrophy. C) cystic fibrosis. D) LDL-receptor deficiency. E) colon cancer.