Exam (elaborations)
Portage Learning BIOD 210 Genetics Final Exam. Questions and Answers
- Course
- BIOD 210 -Genetics
- Institution
- Portage Learning
Portage Learning BIOD 210 Genetics Final Exam. Questions and Answers
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Question 1The haploid number in human is ___, while the diploid number is ___.
Answer: 23, 46
Question 2
Which of the following is correct?
Sister chromatids are held together by cohesion.
Chromosome bodies are responsible for the formation of spindle fibers.
In metaphase, centromeres are dispersed throughout the nucleus.
All are correct.
Question 3
True or False: Genetic information can be transferred between bacteria on a single-
stranded RNA molecule called a plasmid.
False.
Question 4
True or False: A chromosomal aberration is an alteration to the chromosome that results in
a change to the total number of chromosomes, deletions or additions to the chromosome,
or even complete rearrangement of chromosomal segments.
True.
Question 5
True or False: Most scientists believe that the biggest driver of a cancer phenotype is the
ability of cancer cells to avoid apoptosis.
False
, Question 6
Explain briefly how the idea of epigenesis and preformation directly contradict each other.
Preformation postulated that a fertilized egg contained a miniaturized version of a tiny
human, called homunculus. Epigenesis directly contradicted that theory by stating
that a fertilized egg undergoes a series of developmental events that eventually form a
human.
Question 7
Which of the following statements is correct?
The X chromosome is much larger than the Y chromosome.
The X and Y chromosomes share no homology.
The X chromosome is the driving determinant for sex of an offspring.
Incorrect segregation of X and Y chromosomes (for instance a female with XXX or X
genotype) is always embryonic lethal.
Question 8
The DNA in a ___ is packaged in the head, which is shaped like a capsule. The ___ of the
phage pushes the DNA through the host cell membrane much like a syringe.
Answer: phage, sheath
Question 9
The only trisomy disorder in which individuals routinely live longer than one year is ___. The
incidence of this disorder seems to increase with maternal ___.
Down syndrome (or trisomy 21); age
Down syndrome; health
Cystic fibrosis; age
Klinefelter syndrome; age
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