Bio Chapter 13

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flashcards about biology


 
  
Created Dec 4, 2011
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beck.483

 

 
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1

1) What is a genome?A) The complete complement of an organism's genesB) A specific set...
 
A) The complete complement of an organism's genes
2

2) Which of the following statements about genes is incorrect?A) Genes correspond to segments...
 
D) One gene only is used in a specific cell type.
3

3) Asexual reproduction and sexual reproduction differ in all but which of the following...
 
E) Asexual reproduction is utilized only by fungi and protists, whereas sexual reproduction...
4

4) If a horticulturist breeding gardenias succeeds in having a single plant with a particularlydesirable...
 
C) Clone the plant asexually to produce an identical one.
5

5) Asexual reproduction results in identical offspring unless which of the following occurs?A)...
 
D) Mutation
6

6) The human genome is minimally contained in which of the following?A) Every human cellB)...
 
A) Every human cell
7

7) A gene's location along a chromosome is known as which of the following?A) AlleleB)...
 
C) Locus
8

8) What is a karyotype?A) The set of unique physical characteristics that define an individualB)...
 
E) A display of every pair of homologous chromosomes within a cell, organized according tosize...
9

9) At which stage of mitosis are chromosomes usually photographed in the preparation of...
 
B) Metaphase
10

10) The human X and Y chromosomesA) are both present in every somatic cell of males and...
 
D) include genes that determine an individual's sex.4
11

11) Which of the following is true of a species that has a chromosome number of 2n = 16?A)...
 
C) Each cell has 8 homologous pairs.
12

12) Eukaryotic sexual life cycles show tremendous variation. Of the following elements,...
 
C) II, III, and IV
13

13) Which of these statements is false?A) In humans, each of the 22 maternal autosomes...
 
D) At sexual maturity, ovaries and testes produce diploid gametes by meiosis.
14

14) In animals, meiosis results in gametes, and fertilization results inA) spores.B) gametophytes.C)...
 
C) zygotes
15

15) Referring to a plant sexual life cycle, which of the following terms describes the...
 
B) Gametophyte mitosis
16

16) Which of the following is an example of alternation of generations?A) A grandparent...
 
B) A diploid plant (sporophyte) produces, by meiosis, a spore that gives rise to a multicellular,haploid...
17

17) Which of the life cycles is typical for animals?A) I onlyB) II onlyC) III onlyD) I...
 
A) I only
18

18) Which of the life cycles is typical for plants and some algae?A) I onlyB) II onlyC)...
 
C) III only
19

19) Which of the life cycles is typical for most fungi and some protists?A) I onlyB) II...
 
B) II only
20

20) In part III of Figure 13.1, the progression of events corresponds to which of the followingseries?A)...
 
E) Meiosis, fertilization, zygote, mitosis, adult, meiosis
21

21) In a life cycle such as that shown in part III of Figure 13.1, if the zygote's chromosomenumber...
 
A) The sporophyte's chromosome number per cell is 10 and the gametophyte's is 5.
22

22) The karyotype of one species of primate has 48 chromosomes. In a particular female,...
 
E) Either anaphase I or I
23

23) A given organism has 46 chromosomes in its karyotype. We can therefore conclude which...
 
E) Its gametes must have 23 chromosomes
24

24) A triploid cell contains three sets of chromosomes. If a cell of a usually diploid...
 
B) 63 chromosomes in 21 sets of 3
25

25) A karyotype results from which of the following?A) A natural cellular arrangement of...
 
C) The ordering of human chromosome images
26

26) After telophase I of meiosis, the chromosomal makeup of each daughter cell isA) diploid,...
 
D) haploid, and the chromosomes are each composed of two chromatids.
27

27) How do cells at the completion of meiosis compare with cells that have replicated their...
 
D) They have half the number of chromosomes and one-fourth the amount of DNA
28

28) When does the synaptonemal complex disappear?A) Late prophase of meiosis IB) During...
 
A) Late prophase of meiosis I
29

For the following questions, match the key event of meiosis with the stages listed below.I....
 
D) VII
30

30) Synapsis of homologous pairs occurs; crossing over may occur.A) IB) IIC) IVD) VIE)...
 
E) VI
31

31) Centromeres of sister chromatids disjoin and chromatids separate.A) IIB) IIIC) IVD)...
 
E) VI
32

32) Which of the following happens at the conclusion of meiosis I?A) Homologous chromosomes...
 
A) Homologous chromosomes are separated.
33

33) Which diagram represents prophase I of meiosis?A) IB) IIC) IVD) VE) V
 
C) IV
34

34) A cell divides to produce two daughter cells that are genetically different.A) The...
 
B) The statement is true for meiosis I only.
35

35) Homologous chromosomes synapse and crossing over occurs.A) The statement is true for...
 
B) The statement is true for meiosis I only.
36

36) Chromatids are separated from each other.A) The statement is true for mitosis only.B)...
 
E) The statement is true for mitosis and meiosis II
37
37) Independent assortment of chromosomes occurs.A) The statement is true for mitosis only.B)...
 
B) The statement is true for meiosis I only.
38

38) You have in your possession a microscope slide with meiotic cells on it and a lightmicroscope....
 
C) Tetrads lined up at the center of the cell
39

39) If the cells were from a plant, which sample might represent a gametophyte cell?A)...
 
A) I
40

40) Which sample of DNA might be from a nerve cell arrested in G0 of the cell cycle?A)...
 
D) Either I or II
41

41) Which sample might represent an animal cell in G2 phase of the cell cycle?A) IB)...
 
B) II
42

42) Which sample might represent a sperm cell?A) IB) IIC) IIID) Either I or IIE) Either...
 
C) III
43

The following questions refer to the essential steps in meiosis described below.1. Formation...
 
E) 5, 2, 4, 3, 1
44

44) Which of the steps take place in both mitosis and meiosis?A) 2B) 3C) 5D) 2 and 3 onlyE)...
 
D) 2 and 3 only
45

45) Which of the following occurs in meiosis but not in mitosis?A) Chromosome replicationB)...
 
B) Synapsis of chromosomes
46

46) If an organism is diploid and a certain gene found in the organism has 18 known alleles(variants),...
 
A) At most, 2 alleles for that gene
47

47) Whether during mitosis or meiosis, sister chromatids are held together by proteins...
 
D) They must reattach to chromosomes during G1
48

48) Experiments with cohesions have found thatA) cohesions are protected from destruction...
 
C) cohesions are protected from cleavage at the centromere during meiosis I.
49

49) A tetrad includes which of the following sets of DNA strands?A) Two single-stranded...
 
B) Two sets of sister chromatids that have synapsed
50

50) A certain female's chromosomes 12 both have the blue gene and chromosomes 19 both havethe...
 
D) One chromosome 12 with one blue gene and one chromosome 19 with one long gen
51

51) If a female of this species has one chromosome 12 with a blue gene and another chromosome12...
 
C) 1/2 blue and 1/2 orange gene eggs
52

52) A female with a paternal set of one orange and one long gene chromosomes and a maternalset...
 
D) Each egg has 1/4 chance of having blue long, blue short, orange long, or orange shortcombinations.
53

53) Chiasmata are what we see under a microscope that let us know which of the following...
 
D) Crossing over
54

54) How does the sexual life cycle increase the genetic variation in a species?A) By allowing...
 
A) By allowing independent assortment of chromosomes
55

55) For a species with a haploid number of 23 chromosomes, how many different combinationsof...
 
E) About 8 million


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