Genetics Answers

Explain how competition between two species leads to character displacement and ecological exclusion by giving an example.

How did Mendel confirm the Law of Segregation?

a new student of genetics suspects that a particular recessive trait in fruit flies (dumpy wings: d) is sex linked. A single mating between a female fly having dumpy wings and a male fly with normal wings (D) produces 3 dumpy- winged females and 2 normal males. On the basis of these data, is the trait sex-linked or autosomal? what were the genotypes of the parents? explain how the conclusions can be reached on the basis of so few data. male fruit flies are XY and females are XX.

Recall that mendel crossed a true breeding tall, purple-flowered pea plants with a true breeding dwarf, white flowered plant. All the f1 plants were tall and purple flowered. If an f1 plant is now self-pollinated, what is the probability of obtaining an f2 plant heterozygous for the genes controlling height and flower color?

In DNA replication,which enzyme separates the two strands?

A dog with long eyelashes mates with one that has short eyelashes assuming that long eyelashes are dominant over short eyelashes and that the dog with long eyelashes is heterozgous for the trait find the F1 genearation

A gene called “PRNP” produces the prion protein. In humans there are two alleles for the gene,
known as “Met” and “Val”. People who are homozygous for the Met allele can contract
“variant CJD”, the fatal human form of mad cow disease associated with the consumption of
infected beef.
In Denmark, a survey of 352 individuals found that 131 were homozygous for Met, 168 were
heterozygous, and 53 were homozygous for Val. Is the PRNP gene in Hardy-Weinberg
equilibrium? Show your calculations.

In Denmark, a survey of 352 individuals found that 131 were homozygous for Met, 168 were heterozygous, and 53 were homozygous for Val. Is the PRNP gene in Hardy-Weinberg equilibrium? Show your calculations. (4 marks)

What is the accepted method for proving that cells derived from bone marrow are true HSCs? Briefly describe the method.

I'm in search of a good topic for my term paper but I'm lacking ideas. Could you suggest some on which I can write minimum 15 pages.