Meiosis And Genetic Crosses Question Preview (ID: 7728)


Genetic Crosses. TEACHERS: click here for quick copy question ID numbers.

Which of the following cells is produced by meiosis?
a) ovum (egg cell)
b) muscle cell
c) blood cell
d) nerve cell

A fruit fly has 8 chromosomes in its somatic (body) cells. How many chromosomes are in its gametes?
a) 23
b) 16
c) 8
d) 4

Which of the following results in genetic variation?
a) cloning
b) mitosis
c) crossing over and independent assortment
d) osmosis

Which of the following represents fertilization?
a) n + n --> 2n
b) 2n --> n
c) 2n + n --> 3n
d) 2n --> 2n

Brown eyes (B) are dominant over blue eyes (b). Which of the following genotypes results in a blue-eyed phenotype?
a) BB
b) Bb
c) bb
d) BB and Bb

Why are males most likely to express (show) an X-linked genetic disorder?
a) The testosterone in males makes them susceptible to genetic disorders.
b) Males carry only one X chromosome, the other sex chromosome is a Y.
c) The Y chromosome is dominant over the X chromosome.
d) Males carry two X chromosomes.

What is the result of the following cross: Hh x Hh?
a) 25% HH, 50% Hh, 25% hh
b) 100% Hh
c) 50% Hh, 50% hh
d) 75% HH, 25% hh

The inheritance of one trait does not affect the inheritance of another trait. This is called . . .
a) Law of Segregation
b) Law of Independent Assortment
c) Fertilization
d) Pollination

Which of the following is NOT a possible allele combination in the gametes of an individual with the genotype: BbCCDd?
a) BCD
b) bcd
c) BCd
d) bCd

Mendel's law of segregation and law of indepedent assortment are supported by the events that occur during ____.
a) Mitosis
b) Meiosis
c) Fertilization
d) Pollination

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