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25 Cards in this Set

  • Front
  • Back
All of the following are sources of genetic variety except:
Which of these is not a unique feature of meiosis?
Diploid daughter cells
The arrangement of the chromosomes in metaphase I of meiosis is not important as long as homologues pair.
The random orientation of different pairs of homologous chromosomes on the metaphase plate is responsible for __________.
B. Independent assortment 100%
The process of independent assortment refers to:
B. the orientation of homologous chromosomes at metaphase I
Which scientist is credited with proposing in 1887 that an egg and a sperm fuse to form a zygote?
E. van Beneden 100%
The alignment of homologous chromosomes with the exchange of genetic information between them is known as:
C. crossing over 100%
During which stage of meiosis does crossing over occur?
A. Prophase I 100%
Bacteria reproduce by meiosis.
B. FALSE<br/><br/> 100%
Independent assortment of homologous chromosomes occurs at:
B. metaphase I 100%
In plants like the fern, haploid cells produced by meiosis divide by _________, forming a multicellular haploid phase.
C. mitosis 100%
In animals, asexual reproduction can involve the budding off of cells which grow by mitosis into a new individual.
A. TRUE 100%
When does separation of homologous chromosomes occur?
B. Anaphase I 100%
Some organisms are able to reproduce both sexually and asexually.
A. TRUE 100%
In humans, how many different kinds of gametes can be produced due to independent assortment only?
D. 223 100%
Meiosis is also known as reduction division.
A. TRUE 100%
Reproduction by mitosis only is asexual.
A. TRUE 100%
After meiosis, the gamete joins with another gamete in all eukaryotic organisms
B. FALSE<br/><br/> 100%
In anaphase I, ________ separate and in anaphase II, ____________ separate.
A. homologous chromosomes, chromatids 100%
Why is crossing over not possible in meiosis II?
A. Because homologous chromosomes are no longer in the same cell. 100%
The main difference between prophase I and II is that in prophase I:
A. synapsis and crossing over occurs
In humans, _____________ divide by meiosis to produce eggs and sperm.
D. germ-line cells
Which is incorrect about meiosis?
C. Sister chomatids separate in anaphase I. 100%
Animals do which type of reproduction?
C. Sexual and asexual 100%
During which stage do chromosomes line up in single file on the equatorial plane?
C. Metaphase II