12. An organism with a genome size of n = 23 experiences a Robertsonian transloc
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Question
12. An organism with a genome size of n = 23 experiences a Robertsonian translocation. How many chromosomes would you expect to see in a karyotype of a somatic cell of the affected individual?
A) 21
B) 25
C) 42
D) 44
E) 46
13. Which of the following is a common consequence of polyploidy?
A) increase in cell size
B) increase in flower size and fruit
C) decrease in homozygous recessive
D) a and b
E) all of the above
14. What type of chromosomal rearrangement results in half of all meiosis producing non-viable gametes and the other half producing viable gametes?
A) chromosomal partial duplication
B) paracentric inversion
C) pericentric inversion
D) reciprocal translocation
E) none of the above
15. syndrome CRI-du-chat is a human condition caused by what type of default cromosomal?
A) translocation
B) investment
C.) translocation robertsoniana
D) deletion terminal and) none of the previous
16. a operon with negative control, what molecule you expect to find attached to the operator if there is no transcript?
A) activator
B) repressor
C.) inducer
D) corepresor
E) RNA polymerase
17. Anais going to design a protein repressive mutant. What domain protein is the best White to prevent the Union of corepresor?
A) the binding domain to DNA
B) domain alostérico
C.) domain of the promoter
D) the domain Helix-rotation-Helix
E) the binding site activator
19. what reaction catalyzes the enzyme B - galactosidase?
A) alolactose -> glucose + lactose
B) lactose -> glucose + fructose
C) lactose -> galactose + glucose
D) glucose -> galactose + lactose
E) galactose -> glucose + lactose
20. bacteria is unable to carry lactose within the cell for degradate it. What Gene probably has a mutation in this bacteria?
A) lacZ
B) lacY
C) lacL
D) lacP
E) lacO
Explanation / Answer
12. D) 44. The number of chromosome pairs (n=23) will be reduced by 1 (n=22) since there is a fusion of two chromosomes. The somatic (diploid) cells would then have 44 chromosomes.
13. E) all of the above.
14. D) reciprocal translocation.
15. D) deletion terminal.
16. B) repressor.
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