21-In which stage of mitosis does exchange of genetic material between chromosom
ID: 276311 • Letter: 2
Question
21-In which stage of mitosis does exchange of genetic material between chromosomes (crossing over) occur?
Select one:
a. prophase II
b. prophase I
c. none of the above
d. anaphase I
22-How does a population differ from an ecosystem?
Select one:
a. An ecosystem includes a community, whereas a population does not.
b.
A population consists of all living organisms in the area, whereas an ecosystem consists of all living and nonliving aspects of an area.
c.
An ecosystem and a population are identical; they are two terms for the same concept.
d.
A population consists of all living organisms in an area, whereas an ecosystem consists of only one species.
23-What is decreased during the process of meiosis?
Select one:
a.
All of the above are true.
b.
the number of cells
c. the number of chromosomes
d.
the size of chromosomes
24-A tendon or ligament is made up principally of loose connective tissue.
Select one:
True
False
25-Albinism is an example of ________.
Select one:
a. a polygenic disease
b.
a dominant disease
c. an autosomal recessive disease
d. a sex-linked disease
26-In which phase do the following events occur: the chromatin condenses into chromosomes, the nuclear membrane disintegrates, and the centrioles migrate to the poles as spindle fibers are organized?
Select one:
a.
anaphase
b. prophase
c.
telophase
d. interphase
27-Specific segments of DNA that are the functional units of inheritance are called ________.
Select one:
a.
chromatids
b.
chromosomes
c.
telomeres
d.
genes
28-Glands that lack ducts and secrete hormones are called exocrine
Select one:
True
False
29-Cancer is associated with problems related to the regulation of ________.
Select one:
a.
mitosis
b.
cytokinesis
c.
meiosis I
d. meiosis II
Explanation / Answer
21)- option bis correct because crossing over occur in prophase-1 where recombinant chromosome is formed.
22)- option b is correct because population is group of organisms but in ecosystem we add non living things in environment.
23)- option c is correct because in this process chromosome number is half after division.
24)- option b is correct because it is made up of dense connective tissue.
25)-option c is correct because it is caused by recessive gene.
26)-option b is correct because division start in prophase.
27)-option d is correct because these are passed from parents to offspring.
28)- false . because they release chemical substance through duct.
29)- option b is correct because it is related to cytokinesis.
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