Unit 7: Complex Inheritance Click to begin

Which of the following genotypes represents Type O blood? A.) I A I A B.) I A i C.) I A I B D.) ii L D.) correct answer F

A.) autosomesB.) multiple alleles C.) sex chromosomesD.) trisomy LF C.) correct answer The 23rd pair of chromosomes that differ in males and females are called _____.

A.) XXB.) XY C.) XO D.) XXY LF B.) correct answer Which of the following genotypes represents a normal human male?

A.) multiple allelicB.) codominant C.) simple dominantD.) polygenic LF Roan cattle have both red and white hairs. This variation demonstrates _____ inheritance. B.) correct answer

A.) codominantB.) sex-linked C.) polygenicD.) environmental LF Hemophilia is a genetic condition in which the blood does not clot properly. Because it is carried on the X-chromosome, it is considered _____. B.) correct answer

A.) incomplete dominance B.) multiple alleles C.) simple dominance D.) codominance LF Hair texture in humans may be straight, wavy, or curly. Because wavy is a mixture of straight and curly, this variation demonstrates _____. A.) correct answer

A.) the offspring’s motherB.) an unknown genotype C.) the offspring’s ageD.) a parent’s phenotype LF A test cross is used to determine _____. B.) correct answer

A.) sickle-shapedB.) too many C.) normalD.) both A & C LF Individuals heterozygous for Sickle Cell Anemia have _____ red blood cells. D.) correct answer

A.) lung cancerB.) hemophilia C.) cystic fibrosis D.) sickle cell anemia LF Which of the following conditions is most likely environmental? A.) correct answer

A.) 100%B.) 50% C.) 25% D.) 0% LF What is the probability of a female fruit fly with white eyes and a male fruit fly with red eyes having red-eyed male offspring? D.) correct answer

A.) fatherB.) mother C.) both parents D.) neither parent LF Color blindness is a sex-linked trait in humans. A colorblind male received the disorder from which of his parents? B.) correct answer

A.) Type A bloodB.) Type B blood C.) Type O blood D.) Type AB blood LF It is not possible for a woman heterozygous for Type A blood and a man homozygous for Type B blood to have a baby with which blood type? C.) correct answer

A.) 0% B.) 25% C.) 50% D.) 100% LF What is the chance that a man and a woman that are both carriers for Sickle-Cell Anemia will have a baby that has the disease? B.) correct answer

A.) codominantB.) simple dominant C.) multiple allelic D.) polygenic LF There are numerous skin and eye colors in humans. These traits are controlled by _____ inheritance. D.) correct answer

A.) karyotypingB.) crossing over C.) nondisjunction D.) UV exposure LF Down Syndrome, which is caused by trisomy at the 21 st chromosome pair, is caused by _____. C.) correct answer

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