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Dihybrid cross, Homozygous condition, Monohybrid cross, Heterozygous condition.




1 of 20;AABB x AAbb represents a;Dihybrid cross.;Homozygous condition.;Monohybrid cross.;Heterozygous condition.;Question;2 of 20;What is the condition called when an expressed trait is somewhere between homozygous dominant and homozygous recessive?;Heterozygous;Incomplete Recessive;Incomplete Dominance;Incompletely Heterozygous;Question;3 of 20;Which of the following refers to the genetic make-up of an individual?;Phenotype;Allele;Genotype;Parental generation;Question;4 of 20;Which of the following examples illustrates pleiotropy?;In fruit flies, the genes for scarlet eyes and hairy body are located on the same chromosome.;The human cystic firbrosis gene causes many symptoms, from respiratory distress to digestive problems.;Matings between earless sheep and long-eared sheep always result in short-eared sheep.;Wheat kernels can range from white to red in color, a trait controlled by several genes.;Question;5 of 20;A true-breeding plant that produces yellow seeds is crossed with a true-breeding plant that produces green seeds. The F1 plants have yellow seeds. What is the expected phenotypic ratio of seed color of the offspring of an F1 ? F1 cross?;1:2:1;2:1;3:1;9:3:3:1;Question;6 of 20;A brown mouse is mated with a white mouse. All of their offspring are brown. If two brown offspring are mated, what fraction of their offspring will be white?;All;None;one-half;one-fourth;Question;7 of 20;Mendel crossed true-breeding purple-flowered plants with true-breeding white-flowered plants, and all of the resulting offspring produced purple flowers. The allele for purple flowers is;segregated.;monohybrid.;dominant.;recessive.;Question;8 of 20;Kelly is blood group AB, Jacob is blood group B, and their daughter is blood group B. Given this information, it would be impossible for the couple to have a child with which of the following blood groups?;O;A;B;AB;Question;9 of 20;Attached earlobes are recessive to free earlobes. What is the probability of having a child with attached earlobes when an individual with attached earlobes mates with an individual heterozygous for free earlobes?;0%;25%;50%;100%;Question;10 of 20;Which of the following human genetic disorders is sex-linked?;PKU;Hemophilia;Cystic fibrosis;All of the above;Question;11 of 20;In humans, the presence or absence of dimples is a trait controlled by a single gene. What is the genotype of an individual who is heterozygous for dimples?;DD;dd;DI;Dd;Question;12 of 20;Mendel made some crosses where he looked at two characteristics at once: round yellow peas crossed with wrinkled green peas, for example. He did this because he wanted to find out;whether different characters were inherited together or separately.;how plants and animals adapt to their environments.;how new characters originated.;whether the characters influence each other, for example, whether color affects degree of roundness.;Question;13 of 20;An individual with the genotype AaBb produces four different gametes in equal proportions. This is a demonstration of;linkage.;Mendel's law of independent assortment.;Mendel's principle of segregation.;crossing over.;Question;14 of 20;Most sex-linked traits in humans are carried on the ________ chromosome, and the recessive phenotypes are seen most often in __________.;X, women;X, men;Y, women;Y, men;Question;15 of 20;Chromosomes that are not sex chromosomes are called;centrosomes.;allosomes.;dominant.;autosomes.;Question;16 of 20;A pea plant with purple flowers is heterozygous for flower color. Its genotype is Pp. The P and p alleles in the pea plant's cells are located;at corresponding locations on homologous chromosomes.;on the X and Y chromosomes.;next to each other on the same chromosome.;at different locations on the same chromosome.;Question;17 of 20;Hypohosphatemia (vitamin D-resistant rickets) is inherited as a sex-linked dominant trait. The relevant gene is found on the X chromosome. What is the expected outcome of a cross between a homozygous recessive woman and a man with hypophosphatemia?;Fifty percent of their daughters and 50% of their sons exhibit hypophosphatemia.;Seventy-five percent of their offspring exhibit hypophosphatemia.;All of their daughters and none of their sons exhibit hypophosphatemia.;All of their sons and none of their daughters exhibit hypophosphatemia.;Question;18 of 20;When looking at the inheritance of a single character, Mendel found that a cross between two true-breeding peas (between purple and white, for example) always yielded a ______ in the F2 generation.;1:1 phenotypic ratio;3:1 genotypic ratio;1:1 genotypic ratio;3:1 phenotypic ratio;Question;19 of 20;Which genotype would result in an individual with the recessive phenotype?;aa only;Aa only;Aa or aa;AA only;Question;20 of 20;How many different types of gametes can be generated by an individual with genotype AaBB?;1;2;4;8


Paper#15112 | Written in 18-Jul-2015

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