Genetics 2 Review: Question Preview (ID: 8619)

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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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