When two pairs of homologous chromosomes join for crossing-over, the complex is called a ____

a. kinetochore
b. centromere
c. sister chromatid
d. tetrad
e. chiasmata


ANSWER: d

Biology & Microbiology

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Which two experiments best demonstrate that the gene AP3  is important for flower development? (Choose two)  

_____ When a wild type AP3 transgene is expressed in an AP3 mutant, the plant produces normal flowers. _____ When AP3 is deleted, the plant produces deformed flowers. _____  When the genes PI and AP3 are both deleted, the plant produces deformed flowers. _____  When a wild type AP3 transgene is overexpressed, the plant produces normal flowers. _____  When a wild type AP3 transgene is overexpressed, the plant produces deformed flowers. _____  When AP3 is duplicated, the plant produces deformed flowers. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean?   Gather Content · What do you already know about the flower development genes?   Consider Possibilities · Consider the different answer options. Which can you rule out?   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

Which gas is considered a greenhouse gas?

A) water vapor B) carbon monoxide C) gaseous nitrogen D) nitrous oxide

Biology & Microbiology

Which one of the following sexually transmitted diseases is caused by bacteria?

A) chlamydia B) genital herpes C) hepatitis B D) genital warts E) trichomoniasis

Biology & Microbiology

Which of the following is not a statistical value often used to represent a sample when evaluating QTLs?

A) mean B) mode C) variance D) standard deviation

Biology & Microbiology