Genetics 2 Review Question Preview (ID: 8619)
Genetics Test Review.
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A married couple both have normal color vision, but their son has red-green colorblindness, a X-linked recessive trait. How is this possible?
a) His brother could be a carrier.
b) His grandmother could be a carrier.
c) His mother could be a carrier.
d) His father could be a carrier.
In a cross between a white-eyed female fruit fly and pure red-eyed male, what percent of the male offspring will have white eyes? (White eyes are X-linked and are recessive.)
a) 100%
b) 25%
c) 50%
d) 75%
What symbol on a pedigree chart would show a female that is colorblind?
a) half shaded circle
b) empty shaded circle
c) empty circle
d) full shaded circle
A test is done on a developing fetus (baby). The fetus has two X chromosomes. Which of the following is definitely true?
a) The baby will be happy.
b) The baby will be a colorblind boy.
c) The baby will be a girl.
d) The baby will have blond hair.
What shows the possible genetic combinations from the parent to the offspring?
a) In a pedigree, boys are represented using squares.
b) In a pedigree, girls are represented using circles.
c) A pedigree square
d) A Punnett sqare
A woman is heterozygous dominant for brown eyes. Will any of her children have blue eyes?
a) yes
b) maybe, depends on the father
c) no
d)
Sometimes a blending of traits occurs. When a white flower is crossed with a red flower, the resulting flower is pink. This is an example of ?
a) genetic engineering
b) incomplete dominance
c) cloning
d) selective breeding
A special kind of cell division in which gametes are formed is called
a) mitosis
b) meiosis
c) replication
d) long division
Who would be an example of a boilogical son?
a) a step-son from a previous marriage
b) a boy who was adopted
c) a boy whose mom gave birth to him in the hospital
d) a kid we picked up at the pool
How many pairs of chromosomes do boys have?
a) 46
b) 23
c) 21
d) 22
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