Some alleles in the heterozygous state are beneficial, whereas in the homozygous state they are harmful

A. true
B. false


A

Biology & Microbiology

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In humans, hemophilia is caused by a recessive allele on the X chromosome. Suppose a man with hemophilia has children with a healthy woman whose mother had hemophilia. What is the probability that their second child will have hemophilia? (Enter the probability as a percent. Enter the number only without the percent sign. For example, enter 100% as 100 and enter 12.5% as 12.5)  

What will be an ideal response? Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain?   Gather Content · What do you already know about X-linked inheritance?   Consider Possibilities · What other information is related to the question? Which information is most useful?   Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?   Reflect 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?

Biology & Microbiology

The major source of nitrogenous nutrients in estuaries is incoming seawater

Indicate whether the statement is true or false

Biology & Microbiology

A compound can rotate about a double bond to interconvert between cis and trans configurations.

a. true b. false

Biology & Microbiology

Which of the following sequences correctly represents the flow of electrons during photosynthesis?

A) NADPH ? O2 ? C O2 B) H2O ? NADPH ? Calvin cycle C) NADPH ? chlorophyll ? Calvin cycle D) NADPH ? electron transport chain ? O2

Biology & Microbiology