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Genetics

X-linked genes and finding genetic map distance

A female heterozygous drosophila melanogaster with the x linked genes of singed bristles (sn), crossveinlesss wings (cv), and vermillion eye colour (v) is testcrossed with a singed, crossveinless, vermillion male and the following progeny were obtained: 1 singed, crossveinless, vermillion 3 2 crossveinless, vermilli

Genetics: Eye color probabilities

Both parents have the brown/blue pair of eyes color genes, and each parent contributes one gene to a child. Assume that if the child has at least one brown gene, that color will dominate and the eyes will be brown. (The actual determination of eye color is somewhat more complicated.) a. List the different possible outcomes

Populations and Gene Pools

Postulate why populations in northern climates have gene pools in which most members have the recessive genotype (bb for blue) for eye color, while populations in Africa and South America more often have gene pools with the dominant genotype (B for brown).

Cell division, mutations and genetic variability.

Eukaryotic cells can divide by mitosis or meiosis. In humans, mitosis produces new cells for growth and repair. And, meiosis produces sex cells (gametes), called sperm and eggs. Changes or mutations in genes in sex cells can be inherited by human offspring. Genetic variation in a population of organisms is good; however, sometim

Genetics Problem- Human Blood Types

A. APunnett Square represents a cross (mating) between a male (on the left side) with blood type AB, and a female, (top of square), with blood type A, genotype Ao. Answer the following for the cross represented above. 1. What are the possible blood types for the offspring? 2. What are the ratios or percentages for each poss

Description of the Structure of DNA

Describe the structure and function of DNA as the molecule of inheritance. I need a better understanding of the below: a. Describe the structure of DNA. b. Discuss how the structure of DNA allows it to serve as the basis for inheritance. c. Examine how meiosis allows DNA to be divided into gametes. d. Describe how

Biotechnology: Discussing Gene Therapy

Biotechnology allows us to use living organisms or their processes for human needs or purposes. This current topic includes such examples as cloning, stem cells (adult, umbilical cord, and embryonic), DNA fingerprinting, biological warfare, bioremediation, genetically modified organisms, vaccines, and transgenic plants and anim

Characteristics of DNA and RNA molecules, and their function.

1.What unique ability do DNA molecules have? Why is this ability so important? 2.What are the similarities and differences in DNA and RNA? 3.What are the respective functions in general and in protein systhesis? 4.What are the various factors that might damage genes? 5.Explain the process of mitosis along with its variou

Genetic Characteristics that cannot be Explained by Simple Mendelian Genetics

Part 1: Genetics Problem- Human Blood Types Mendel is the father of modern genetics, but there are some genetic characteristics that cannot be explained by simple Mendelian genetics. Such is the case with the human blood types in which there are 3 alleles for the same gene, A B, and o. A parent can pass allele A, B, or o to th

Mendel and the Gene Idea

I am having trouble with these few sample problems. I really do not understand the concept of Mendel's ideas. Can someone please elaborate? Please see attached file.

Population Genetics Hardy Weinberg

I am having a very hard time trying to figure this out. I need someone to explain to me how to go about this...showing an explaining their work. My goal is to gain assistance understanding this for I need to grasp this, so please show me HOW! In a population of monkeys, there are two types of coat color that follow simple M

A researcher studied six independently assorting genes in a plant.

A researcher studied six independently assorting genes in a plant. Each gene has a dominant and a recessive allele: R black stem, r red stem; D tall plant, d dwarf plant; C full pods, c con­stricted pods; O round fruit, o oval fruit; H hairless leaves, h hairy leaves; W purple flower, w white flower. From the cross (P1) R

Inheritance of eye color

Dear sir, I have got a query about how genes are transmitted from parents to kids. The situation is: I am blue eyed, my mother is green eyed and my dad is brown eyed. This far so good, no problems: I thought,my mum is green(G)-blue(b) and my dad is brown(B)-blue, so I had 1 out of 4 of turning out being blue. It's norma

Mitosis and Meiosis Processes

Explain why the process of mitosis and meiosis are both important to a living organism. When would an organism need to undergo the process of mitosis? Meisis? What would happen if meiosis did not occur?

HER-2 expression in cancer cells

I'm writing a report on cells which overexpress HER-2. The report consists of 5 mini reports and is for a Biomedical Techniques module I am doing. Part of the report is on the monolayer culture and passage of cells and also requires calculations for multiplication rate, doubling time etc (have done these) I have two main que

Mendel on Patterns of Inheritance

How did Mendel's approach to answering scientific questions differ from that of his contemporaries? How did his novel approach contribute to his success in describing how traits are inherited? What advantages did he enjoy by choosing to study the garden pea?