Genetics Questions

How does natural selection explain how bacterial populations evolve resistance to antibiotics? Select the single best answer. A.) antibiotics cause resistance mutations in bacteria, that are then passed on to their progenyB.) individual bacteria adapt to antibioticsC.) individual bacteria adapt to antibiotics and pass on their adaptations to their progenyD.) rare, resistant mutant bacteria in the population survive antibiotic treatment

Does evolution of bigger, sexually reproducing organisms happen on time scales faster than geologic time?

To have communication between cells, you must have a:a. Receptorb. Signaling moleculec. Responding Celld. All of the above

In mice, the homozygous mice are black and white. The heterozygous mice are gray. What pattern of inheritance is expressed in fir color in mice?a. Complete dominanceb. Codominance c. Incomplete dominance d. Pleiotropy

A child of a parent with blue eyes and parent with brown eyes, who has brown eyes.

When a trait is controlled by more than one gene it is ______.a. Sex linked inheritanceb. Multiple allelesc. Polygenic inheritanced. Incomplete dominance

A person with blood type (phenotype) O has children with a person with blood type (phenotype) AB. Given the possible genotypes of the parents, their children might have which of the following blood types?A. AB onlyB. O onlyC. AB, A, or B, but not OD. AB, A, B, or OE. A, or B, but not AB or O

What are the four steps of the basic signal transduction pathway?a. Signaling, Attachment, Traveling Resultb. Binding, Diffusion, Traveling, Responsec. Traveling, Reception, Relaying, Responsed. Signaling, Reception, Transduction, Responses

If the mother of a child is homozygous B, and the father is type A. What will be the possible blood group in their offspring?a. AB and B possibleb. AB and A possiblec. A and B possibled. O possible

What is the probability of a child with AB blood, if the father has AA blood and the mother has AB blood?a. 25%b. 50%c. 75%d. 100%

Given equal probabilities of the birth of an XY or XX, what is the probability that a group of four siblings includes all XY? All XX? All XY or all XX?A. 1/8; 1/16; 3/8B. 1/16; 1/16; 1/64C. 1/16; 1/16; 1/8D. 1/16; 1/8; 3/8

Which of the following represents the expected ratio of offspring phenotypes from the cross of an individual who is homozygous for the dominant allele of an autosomal gene with an individual who is heterozygous for the dominant and recessive alleles of the gene?A. 1:1B. 3:1C. 9:1D. 1:0E. you can’t tell

The A and B genes are found on the same chromosome, with dominant (A, B) and recessive (a,b) alleles. After crossing AaBb x aabb, 90% of the offspring are have AB or ab phenotypes, 5% are Ab and 5% are aB. Q1: Which alleles were linked on the two parental, non-recombinant chromosomes in the AaBb parent? AB and abQ2: How many cM (map units) separate the A and B genes on the chromosome? 50

A calf of a red cow and a white cow, who has a roan coat consisting of red and white hairs.

Take a look at the following pedigree:Three generations of this family are shown (I, II, III). In the second generation there is a pair of XY twins (line II, 16 and 17).According to this pedigree, is the inherited trait sex-linked? If this is an inherited dominant trait, then what can you conclude about the twins?

Human trisomy for the X chromosome is better tolerated than trisomy for the autosomes because:A. extra autosomes turn into Barr bodiesB. extra X chromosomes turn into Barr bodiesC. there are so few important genes on the X chromosomeD. there are so many more autosomes

The lac operon controls the production of beta-galactosidase and lactose permease proteins. A mutation in the lac repressor protein that prevented it from binding lactose would likely cause the cell to:A. always produce the beta-galactosidase and lactose permease proteins irrespective of whether lactose is present or absent.B. never produce the beta-galactosidase and lactose permease proteins irrespective of whether lactose is present or absent.C. produce beta-galactosidase and lactose permease proteins only when lactose is present.D. produce beta-galactosidase and lactose permease proteins only when lactose is absent.E. produce beta-galactosidase but not lactose permease..

Fill in the blank: When a single base is deleted from an exon of a gene encoding a protein, this most often leads to a _______ mutation.A. frameshiftB. antisenseC. silentD. promoterlessE. common sense

A human zygote contains 45 chromosomes instead of the usual 46. This can be caused by:A. non-disjunction during a meiotic cell division producing either egg or spermB. failure of the egg nucleus to be fertilized by the spermC. incomplete cytokinesis during spermatogenesis after meiosis ID. failure of an egg to complete meiosis II

We have a pea plant that is heterozygous for two traits - height and seed color. The plant is tall and yellow, which are dominant phenotypes; short and green are recessive phenotypes.We will let this plant self-fertilize, and see what kind of offspring this plant produces. This is a dihybrid cross; we are tracking two traits - T (tall) to denote height and Y (yellow) to denote seed color. The plant is heterozygous for both traits so the plant is TtYy.What type of gametes will a TtYy plant produce? Commas in the answers separate types of gametes. TY, Ty, tY, tyDraw out a Punnett square for the dihybrid cross: TtYy x TtYyDetermine the ratio of the following phenotypes:tall and yellow: short and yellow: tall and green; short and green = 9:3:3:1