Exam 20: Sexual Reproduction, meiosis, and Genetic Recombination

The ________ plasmid of Agrobacterium tumefaciens is often used as a vector for cloning and introducing foreign genes into plants.

Fungi produce gametes by which of the following processes?

There is a great need for organs by humans that far exceeds the number available in the organ banks.Many times an available organ cannot be used because of tissue mismatches.Describe how you could use transgenic animals to fill this need.Also,what may be some of the possible negative aspects to such a treatment?

________ is the mechanism by which some organisms,such as Komodo dragons,can develop eggs into zygotes without the need of sperm.

The alternative forms of a gene that can be expressed are known as

A series of three genes is known to be on the same chromosome.In examining recombination events,you obtain the data shown below. No observable recombination 30% Between A and B 15% Between B and C 35% Between A and C 20% What is the order of genes on this chromosome?

Mosses and ferns produce gametes by the process of

A pea plant is known to be heterozygous and is described as YyWw.This is the plant's ________.

Some mice,known as ________ mice,are genetically bred to be missing particular genes.

In an individual pea plant,the seeds are yellow and wrinkled.These attributes are the plant's ________.

The genotype of a particular pea plant is TtYy,corresponding to a phenotype of tall and yellow.How many different types of gametes are expected to be produced by this individual?

One way to facilitate gene therapy to particular types of cells is via genetically engineered ________ infections.

During bacterial conjugation,you wish to examine genes associated with the F plasmid of your bacterial strain of interest,as you feel that it possesses an additional gene.You are able to easily determine the presence or absence of the gene you believe to be associated with the plasmid.In order to investigate this possibility,you must allow conjugation between your strain and a compatible strain that is

Using restriction enzymes,a eukaryotic gene is cut,ligated into a bacterial plasmid,and introduced into a strain of E.coli.To better the odds of getting expression of the eukaryotic gene in this system,you need to make certain that

Mendel,in working with monohybrid crosses,discovered that alleles are discrete entities,typically showing two variations per trait.These variations can be separated from each other and observed in the resultant offspring.This was the basis of Mendel's law of ________.

You purchase a black dog from a pet shop that tells you this animal is a purebred and that they will forward its papers to you at a later date.In this breed,black is dominant to white.You mate the dog with a white dog of the same breed.If the dog you purchased was a purebred animal,what approximate percentages of colors should you see in the offspring?

You mate a squash with the genotype AAbb with a squash with the genotype aaBB.The resulting F1 squash are all AaBb.After mating two F₁ squash,you obtain an F₂ generation of squash as follows: A- B- 5 A- bb 45 aa B- 47 aa bb 3 Total 100 Are A and B linked? Why or why not?

During bacterial conjugation,interrupted matings yielded the following information: leu 10 minutes,arg 8 minutes,str 15 minutes,and amp 12 minutes.Based on this information,the order of the genes,beginning at the origin,is

The first disease to be treated by gene therapy was ________.