Biology

The cloning process copies genes and chromosome pieces to generate identical material through nonsexual means. Cloning an organism creates a new organism with the same genetic information as a cell from the existing organism. What are two techniques used to clone an organism, thus making an exact copy of cells in the original organism? What are benefits of cloning a human being? What are the risks? What types of issues could evolve form cloning humans?

Mendel/Punnett Square/Genotypes

Having a problem understanding Mendel's theory, would like help answering these scenario's. Have to write an report based on these questions please help Assume that “S” represents the dominant trait of having long leaves, and “s” represents the recessive short-leafed trait in a plant. In the parental generation, you cross a homozygous long-leafed plant with a homozygous short-leafed plant. Draw a Punnett square illustrating this cross, and give the genotypes and phenotypes of the F1 generation. Using a Punnett square, show the genotypes and phenotypes of the F2 generation if the F1 plants in question 1 are self-fertilized. In question 2, what is the probability that the F2 ... click for more

Is it the paternal or maternal X that is missing in the Turner's syndrome female?

2. An individual with Turner's syndrome and afflicted with the X-linked recessive trait nystagmus is produced by parents that are both phenotypically normal. The individual has a brother that is also afflicted with nystagmus and a brother that is phenotypically normal. Is it the paternal or maternal X that is missing in the Turner's syndrome female? How do you know? 9. P1 transduction was done to determine the order of the fadD, gap, and pabB genes relative to each other. The donor was fadD-gap+ pabB- and the recipient was fadD+ gap- pabB+. Gap+ transductants were selected. The coinheritance of the nonselected markers are shown in the table below.

Genetics Problems

1) Consider a genetic locus that could hold either of the alleles P or p (where P is dominant, p is recessive). Consider a second genetic locus (for some other unrelated trait) that could hold either of the alleles R or r. Listed below are some genotypes of individuals for each of these loci: a) PPRR b) PpRR c) ppRr d) PpRr For each of these genotypes, assume that the two loci assort independently of each other (2nd law). Figure out what different kinds of gametes they could form. 2) Consider again the loci Pp and Rr. Individuals with the following genotypes are mated to each other: a) PpRR X PPRr b) PpRr X pprr c) PPRR... click for more

Chromosomes

How would a pair of sister chromosomes differ from homologous chromosomes? If the reproductive cell only has 23 chromosomes, then how come all of our body cells (somatic cells) have 46 chromosomes? Briefly describe the constituent molecules found within a chromosome. You may use a diagram to illustrate your answer. Reference your sources. What is a gene? What is a genome? What does a gene do? How many genes (approximately) does the human genome contain?