Exam 20: Sexual Reproduction, meiosis, and Genetic Recombination

________ chromosomes pair during ________ of meiosis.

The DNA of gene X in humans has been isolated,cloned,and sequenced and is 8000 base pairs in length.From cells that were actively transcribing gene X,a cDNA library was made.In this case,gene X was found to produce from an mRNA that was 4200 bases in length.The most probable explanation of these results is that

An individual has the genotype AaBbCcDdEe.How many different type of gametes can this individual make?

Describe,in detail,how you would obtain a gene from a tomato plant and express this protein in bacterial cells.BamHI sites at either end surround the tomato gene of interest.You may use any vector of your own design in the process.

Homologous chromosomes are held together in the

Which of the following is not a reason to genetically engineer crop plants?

Which of the following organisms spends its life cycle in the haploid state?

In analyzing dihybrid data,Mendel discovered not only that these alleles separate from each other when examining one trait,but also that the alleles of a second trait will separate from each other without regard to those of the first trait.This observation was the basis of Mendel's law of ________.

Meiosis I results in the formation of

Which of the following is not a "natural" means of transferring DNA in prokaryotes?

In studying T cell proliferation (cell division)in response to a specific antigen,you decide to stimulate these T cells with antigen and examine the genes that are activated by the interaction.To do this,following stimulation you should isolate

When looking at a linear ascus of spores in Neurospora,you find the following octet: Leu- Leu- + + Leu- Leu- Leu- + This sequence of spores most likely arose as the result of

Mitosis and meiosis differ in that

It is your task to prove the chromosomal theory of inheritance in your cell biology class.Your task is limited by examining only one trait in Drosophila.You may use the tools of modern biotechnology to aid you in your progress.Which of the following would be least likely to help you in your endeavor?

You have recently purchased a black angus bull named Maxwell,an advertised "pure-breeding" champion,for which you pay $1,000,000.You mate Max with several cows that are verified pure breeding black angus cows.Several years later,you mate different pairs of Max's offspring (F₁ × F₁)and find that,with certain pairings,approximately one fourth of the progeny are red (F₂).If B = black and b = red,what were the genotypes of the original cross (Maxwell × cow)?

In bacterial cells,a cell that had the F plasmid integrated into the chromosome is known as

Genetic variability in sexually reproducing organisms arises within

Transplants of organs or tissues from two genetically unrelated organisms is known as a(n)

Describe F⁻,F⁺,Hfr,and F' bacterial cells.How would one use this information to map the E.coli genome?