test_chapter21

test_chapter21 - Chapter 21: The Genetic Basis of...

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Chapter 21: The Genetic Basis of Development MULTIPLE CHOICE 1) A model organism for genetic studies of development should ideally meet certain criteria. Which of these is not one of the criteria? A) readily observable embryos B) short generation times C) relatively small genomes D) the presence of unique features not observed in other organisms E) availability of detailed knowledge concerning the organism's genes ANS: D PTS: 1 TOP: Overview 2) Which of the following are common model organisms in the study of developmental genetics? A) Homo sapiens B) Drosophila melanogaster C) Arabidopsis thaliana D) B and C only E) A, B, and C ANS: D PTS: 1 TOP: Overview 3) The nematode Caenorhabditis elegans is used as a model organism for genetic studies. One of the key advantages of using C. elegans for such studies is that A) it is hermaphroditic, making it easy to detect recessive mutations. B) it has a great variety of somatic cells. C) its genome is as large as ours. D) its development is extremely variable. E) morphogenesis and growth occur throughout its life. ANS: A PTS: 1 TOP: Overview 4) Which of the following is (are) involved in embryonic development? A) cell division B) cell differentiation C) morphogenesis D) A and B only E) A, B, and C ANS: E PTS: 1 TOP: Concept 21.1 5) One striking difference between development in plants and development in animals is the importance of cell ____ in animal embryos. A) division B) differentiation C) growth D) movement E) death ANS: D PTS: 1 TOP: Concept 21.1 6) One striking difference between development in plants and development in animals is that in plant development
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A) growth and morphogenesis continue throughout the life of the plant. B) cell differentiation never stops. C) once a structure develops, it cannot reverse its path. D) cell differentiation is rarely permanent. E) chemical signals play a much greater role than in animal development. ANS: A PTS: 1 TOP: Concept 21.1 7) What is the term for the physical processes that give rise to the shape of an organism? A) morphogenesis B) differentiation C) totipotency D) pluripotency E) mitosis ANS: A PTS: 1 TOP: Concept 21.1 8) The perpetually embryonic regions of plants responsible for continual growth and formation of new organs are called the A) stamens. B) nurse cells. C) myoblasts. D) apical meristems. E) anchor cells. ANS: D PTS: 1 TOP: Concept 21.1 9) "Genomic equivalence" refers to the A) similarity in genomes among all individuals of the same species. B) similarity in genomes between males and females of the same species. C) fact that all the cells of an organism express the same genes, regardless of differences in their genomes. D) fact that all the somatic cells of an organism have identical genomes, regardless of their state of differentiation. E)
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This note was uploaded on 07/03/2008 for the course BIOL 51 taught by Professor Janetkoprivnikar,greggd.jongeward during the Fall '08 term at Pacific.

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test_chapter21 - Chapter 21: The Genetic Basis of...

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