Non-mendelian Genetics
Study Questions

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  1. When two genes are linked on the same chromosome:
  1. they do not assort independent of one another.
  2. crossing over can change linkage patterns relative to expression.
  3. genetic variability is increased.
  1. Which of the following is not true concerning mutations?
  1. Point mutations alter the sequence of amino acids for a single protein.
  2. They are extremely significant and often cause death.
  3. Translocation is a chromosomal mutation.
  4. They are usually recessive and are not expressed.
  1. A male has type AB blood and his wife is heterozygous type A. Whatare the possible blood types of their children?
  1. AB, A, and B only
  2. AB, A, B, O
  3. AB only
  4. AB and A only
  5. A and B only
  1. Of which type of inheritance is the AB blood type?
  1. incomplete dominance
  2. co-dominance
  3. polygenic inheritance
  4. pleiotropy
  5. sex-linked
For #5-6 use the following:

In parakeets a dominant allele, B, produces blue pigmentation while its recessive counterpart, b, doesn't produce an color (bb produces white feathers). The dominant allele, C, controls yellow pigmentation and the recessive allele, c, produces no color (cc produces white feathers). A pair of green parakeets both having the genotype BbCc were crossed producing offspring with four different color patterns (green, blue, yellow, and white).
  1. What would be the expected phenotypes of their offspring?
  1. all green
  2. all blue
  3. all white
  4. 8 green; 8 white
  5. 8 blue; 8 yellow
  6. 4 green; 4 white; 4 yellow; 4 blue
  7. all blue
  8. 8 green; 3 blue; 3 yellow; 2 white
  9. 9 green; 3 blue; 3 yellow; 1 white
  10. 10 green; 3 blue; 3 yellow
  1. The fact that all 4 phenotypes (green, blue, yellow, and white) appeared in the offspring is due to the principle of independent assortment.
TRUE
FALSE
  1. Segregation is the principle that says the B and the b alleles will segregate during meiosis and end up in different gametes.
TRUE
FALSE
  1. Sickle cell anemia is an example of polygenic inheritance.
TRUE
FALSE
  1. Sex-linked inheritance in humans relates to expression patterns of alleles on the X chromosome.
TRUE
FALSE
MATCHING:
(use lower case; incorrect responses will be replaced with a "?".)

10. point mutation a. AbEfG

11. chromosomal mutation b. one nucleotide pair

12. duplication c. AbDCEfG

13. deletion d. AbCDCDEfG

14. translocation e. one or more genes

15. inversion f. AbCDEfGyZ
MATCHING: Group#2

 16. incomplete dominance a. complete expression of both alleles

17. co-dominance b. X-chromosome

18. polygenic inheritance c. one gene influences many traits

19. pleiotropy d. blended expression of both alleles

20. sex-linked inheritance e. many genes influenced one trait
B   R  I   G   H   A   M            Y   O   U   N   G       U   N   I   V   E   R   S   I    T   Y