Chapter
29
Practice
Quiz
1. All of the following
are part of Mendel's Laws except:
a. law of independent segregation
b. law of independent assortment
c. traits are discrete units
d. traits exhibit the law of dominance
e. traits are located on genes
2. The solid ball of cells
in development is called a(n):
a. ovum
b. zygote
c. morula
d. blastula
e. all of the above
3. The point in development
where the germ layers arise is called:
a. ovum
b. zygote
c. morula
d. blastula
e. neurula
4. The chance of having
a Down's syndrome child from a mother giving birth at over 40 years of age is:
a. 1/36
b. 1/365
c. 1/36
d. 1/2
e. none of the above
5. A cross between a homozygous
red pea plant to a homozygous white pea plant would result in a genotypic ratio
of: (assume red is dominant)
a. 4:0 red flowered plants
b. 4:0 white flowered plants
c. 3:red flowered to 1: white flowered plants
d. 1:red flowered to plant to 1: white flowered plant
e. none of the above
6. A test cross of a heterozygous
red flowered plant would result in a phenotypic ratio of:
a. 4:0 red flowered plants
b. 4:0 white flowered plants
c. 3:red flowered to 1: white flowered plants
d. 1:red flowered to plant to 1: white flowered plant
e. none of the above
7. A cross between a homozygous
insulin producer and activator to a homozygous non-producer and non-acitivator
would result in a phenotypic ratio of: (assume production and activation are
dominant traits)
a. 9 normal to 7 diabetic
b. all normal
c. all diabetic
d. 9 normal to 4 partial diabetic to 1 full diabetic
e. none of the above
8. A cross between two heterozygous
melanin producers and depositors would result in a phenotypic ratio of: ( assume
production and deposition are dominant)
a. 9 dark to 7 albino
b. 9 dark to 4 medium to 1 albino
c. 9 dark to 3 medium to 4 albino
d. 3 dark to 1 albino
e. none of the above
9. T F The genotypic ratio is always the same phenotypic ratio in a monohybrid
cross.
10. T F A test cross always uses the homozygous recessive genotype.
11. T F Females are mosaics that may lead to the expression of homozygous recessive traits like color blindness showing up in females.
12. T F Sex-linked traits always occur on the X chromosome and not the Y.
13. T F Genetically linked diabetes is an example of a complementary gene.
14. T F Only females have the ability to form Barr bodies.
16. T F All of the genes present in the mitochondria are from the ovum and not the sperm.
17. T F The male and not the female determines the sex of the offspring.
18. T F An allele is the type of visual expression of a gene for example blue eyes.
19. T F The presence of incomplete dominance modifies the phenotypic ratio but not the genotypic ratio.
20. T F You are glad this is the last test in Anatomy & physiololgy for a while.
21. T F The point of fertilization determines the polarity of the embryo.
22. T F The process of development is irreversible.
23. T F Identical twins that split after eight days are at risk to be cojoined.
24. T F The amount of yolk determines the areas of cleavage.
25. T F Human eggs are mesolecithal in their amount of yolk.
26. T F The optic vesicle is the inducer to produce lens tissue.
27. T F Hair and brains have the same germ cell derivative.
28. T F Wolpert's model states that cells "know" their position in space and time.
29. T F Vitamin B12 is known to cause excess tissue development.
30. T F Teratogenic agents are those that cause cancer.
31. T F The lungs and the gall bladder are both derived from mesoderm.