Genetics Answers

There is a question the says what are the parent genotypes. The only info i have is a punnent square with a capital P on top of the top right box, a capital P on the side of the bottom left box, and Pp in the bottom left box.

DNA Repair
When ultraviolet (UV) radiation damages skin cells, pyrimidine dimers form in the DNA. The dimers are either repaired and the cell can divide, or the cell dies by apoptosis and is shed as the skin peels. Researchers are examining various biochemicals that might be added to sunblock products to lessen the harm from sunburn, without abolishing its protective function. In one experiment, researchers exposed mice to UV radiation with or without a cream containing interleukin-12, a type of immune system protein called a cytokine. The treated mice had fewer thymine dimers and fewer peeling skin cells than did the mice that did not receive in.terleukin-12.
WORKSHEET
1. What are two conclusions that explain these observations?
2. Before interleukin-12 is added to sunscreens products for human use, what further experiments should be done?
3. If the pyrimidine dimers are repaired, is the mechanism more likely to be nucleotide excision or base excision?

True or False: The Y chromosome of the paternal grandfather, father and son will always be the same in the absence of any mutation. If false, make it a correct statement. Explain your reasoning in either case.

explain the relationship between the sequence of these bases and the amino acids in proteins.

A tall plant was grown in nutrients deficient soil and remained dwarf. When it is crossed with dwarf plant then how many will be tall and how many will be dwarf??

A woman with hemophilia (a recessive, sex-linked condition) has a son with hemophilia. The son marries a woman whose father has hemophilia, but she does not.
What is the probability that a daughter of this mating will be a hemophiliac?
A son?
If the couple has 3 sons what is the probability that all of them will NOT be hemophiliacs?

Elaine and Jerry each have a sibling with sickle-cell disease. Neither Elaine, nor Jerry, nor any of their parents has the disease, and none of them has been tested to reveal sickle-cell trait. Based on this incomplete information, calculate the probability that if this couple has a child, the child will have sickle-cell disease.

What would the results be from a cross between a plant of genotype RrAa and one of genotype RRaa

In humans, if P represents the dominant allele for extra fingers and toes (polydactyly) and p is the recessive 5-fingered allele, which of these genotypes would indicate a person with five fingers?

1. The genetic disease called cystic is inherited through a recessive gene. If both parents are heterozygous for this trait. What is the probability that they will have a child who suffers from this diseas?