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Genetics

Genetic Mitosis & Meiosis

1) According to the Law of Segregation, in an organism with the genotype AaBb what types of gametes will be formed? AB Ab aB ab 2) In garden peas, the allele for tall plants is dominant over the allele for short plants. A true-breeding tall plant is crossed with a short plant and one of their offspring is self-pollina

DNA and Heredity

The Planning ,Research and Development , Corp. is seeking grant money to continue their investigation on the relationship between DNA and heredity. You want to apply for the grant money to continue your internship research project . You thought it would help your case if you research projects w

Allele frequency and Blood group system

In a particular random mating population, the frequency of the O allele of the ABO blood group system is .6, the frequency of A is .3, and the frequency of B is .1. a) If a type O man and a type A woman produce a child, what is the probability it will be type O? b) If their first child is type O, what is the probability t

Drosophila

Kruppel and giant are 2 gap genes in drosophila for which the maternal effect gene bicoid serves as a transcriptional activator. Bicoid protein is present in an concentration gradient in the drosophila embryo, with the highest levels at the anterior end and progressively lower levels as one moves toward the posterior pole. a)

Genetic / Evolution

Early in the last century, English physician Archibald Garrod noticed that about half the albinos he saw in the course of his practice were the children of first cousins who had married each other. In almost all of the cases of albinism that he saw, whether or not the parents were related to each other, both of the parents were

Evolution of Man

So we are 98% genetically the same as apes. How do we know this, how is this possible, and what theories/laws does this support?

Genes to Protein

What is the sequence of events that takes place to go from gene to protein. I know there is a set of nucleic acids involved in this process. Identify these nucleic acids and explain their function in the process.

Sicle Cell Anemia

I am reading that sickle-cell anemia is a disease that is genetically prevalent in populations of African and middle eastern decent. How is it that a parent can have the disease and not the offspring and vice versa? Can you provide simple to understand websites for me to continue research on this topic?

Biotechnology and Genetic Engineering

Biotechnology and genetic engineering is changing rapidly. Do you think this pace is safe? Why or why not? What are your thoughts on cloning, genetic screening and manipulation? Can you explain your stand briefly and also provide me with a couple of references that I can use for better understanding? I need websites and verbiag

Vectors

Briefly describe the purpose of the following features found in all or many plasmid cloning vectors. a) origin of replication (ori) b) multiple cloning site (polylinker) c) antibiotic resistane gene

Transgenic Technology

In order to study the function of a gene you have cloned in the mouse, you decide to inactivate it using transgenic technology. Using recombinant DNA techniques, you construct a modified version of the cloned gene by introducing an antibiotic resistance gene into middle of it. Into what kind of cells you will need to introduc

Calculate base pairs (Dna fingerprinting)

In exercise 9 of my lab manual which i attached i need someone to take my distances and calculate base pairs and put it on the graph on page 81. Also tell me which suspect matches the crime scene. My distances are Hind II=20mm,23,25,30,38,39, Crime scene=33,35,52, Suspect 1=37,48,50, s2=27,32,35,41,46, s3=30,33,36,50, s4=37,47,

Genetics problems

Attached are some genetics problems that i have some trouble solving. please solve these problems (showing work as to how you arrived at the solutions with the answers).

Imprinted Gene

Imagine that for a maternally imprinted gene, allele a encodes an inactive version and allele A is the wildtype version. Do you expect the following individuals to exhibit an abnormal phenotype? Why or why not? a) a female of genotype Aa in which the wildtype allele came from her father? b) a male of genotype Aa in which the wil

Encoding a protein with a pair of conflicting signal sequences

Imagine you have engineered a set of genes, each encoding a protein with a pair of conflicting signal sequences that specify different compartments. If the genes wer expressed in a cell, predict which signal would win out for the following combinations. Explain. a. Signals for import into the nucleus and import into the ER

Biology problems

1. A species of wren arrives on a chain of volcanic islands off the coast of New Zealand that previously had no wrens. After several thousand years, wrens from these islands are able to interbreed with occasional migrants from the mainland, but the resulting offspring are poorly adapted to compete with the local wrens and produc

Gene linkage

Eye color in Drosophila depends on the synthesis of two pigments, a red pigment and a brown pigment, resulting in the wild-type (WT) dull red eye color. Mutations blocking production of the brown pigment result in bright red eyes, while mutations blocking production of the red pigment result in brown eyes. If both pathways are

GENE duplication

Gene duplication is an important evolutionary mechanism and, as result , many cases are known where species has two nearly identical genes.ySuppose there are two genes, A and B , that specify production of the same enzyme. An abnormal phenotype results only if an individual does not make any of that enzyme. What ratio of normal

Genotypes

You cross two true breeding strains of zucchini, one with green fruit and the other with yellow. The F1 plants are all green , but when these are crossed, the F2 plants consists of 9 green and 7 yellow. How many genes are involved in determining the zucchini color? Using your own symbols, designate which genotypes yield green an

Grandchildless

1. You have isolated a recessive Drosophila mutant that you call grandchildless (gls) because it behaves in the following way: Cross: gls/gls female x +/+ male F1: All sterile If you perform the reciprocal cross, however, you find that the result is different from that in cross 1: Cross: gls/gls male x +/+ female

A recessive mutation in the human genome...

1. A recessive mutation in the human genome results in a condition called anhidrotic ectodermal dysplasia, which is associated with an absence of sweat glands. The condition can be detected by studies of the electrical conductivity of the skin, because skin without sweat glands has a lower electrical conductivity (higher resist

Hfr strains

In E.coli, four streptomycin-sensitive, prototrophic Hfr strains were mated with a stretomycin-resistant F^- strain auxotrophic for a number of nutritonal requirements. Matings were interrupted at various intervals, and cells were plated on streptomycin-containing minimal meduim supplemented with particular nutrients to test for

Genetics questions

1. Duchene muscular dystrophy (DMD) is due to an X-linked recessive gene. A.Explain why 8 to 10 % of female carriers of the DMD gene have muscle weakness. B. A Female carrier of DMD marries a phenotypically normal man. (i) Given the genotypes of the parents using appropriate genetic symbols. Female____ Male_____ (ii) On ave

Single gene cross: Line A is a true-breeding line of brown mice. Line B is a true-breeding line of white mice. A male from line A is crossed to a female from line B. The resulting F1 offspring are all black. The F2 offspring have black, white, and brown mice. What type of interaction between genes is this?

4. Line A is a true-breeding line of brown mice. Line B is a true-breeding line of white mice. A male from line A is crossed to a female from line B. The resulting F1 offspring are all black. The F2 offspring have black, white, and brown mice. What type of interaction between genes is this? What proportion of sperm from t

Practice problems

1. You're working on golden rice, a plant that promises to alleviate nutritional deficiencies in some developing countries. You cross two true breeding plants. One parent is has fat grains, wavy leaves, red flowers and is short in stature, while the other parent expresses the contrasting phenotypes of thin grains, straight le

Genetic Question

1.In Burmese cats, brown coat color is dominant to tan coat. Brown coat is a highly prized trait in Burmese. You have a brown male cat that you would like to offer as a stud; therefore, you need to know if it is homozygous or heterozygous for brown coat color. A. Why is this important? B.Diagram a testcross that would dete

Meiosis & Sexual Reproduction

1. First, define Meiosis. Then, define and discuss the "cost of meiosis" (Be sure to list at least 2 references in a References section. 2. Second, speculate on why sexual reproduction has evolved.

Sex-Linked Traits

The hemophilia gene is located 12 map units from the red-green colorblindness gene on the X chromosome. Red-green colorblindness is recessive to normal colorvision. A woman with normal blood clotting and normal color vision, but whose father was a hemophiliac and whose mother was red-green colorblind, marries a man who is not a

Four basic genetics problems

Practice problems 1. You're working in a lab that studies a particularly gruesome parasite from the Amazon that infests people's ear canals while they sleep. This parasite has a diploid number of 12 chromosomes in its somatic cells, consisting of 6 homologous pairs (i.e. 6 maternal and 6 paternal chromosomes). Another stud