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The length of a dog's tail is an inherited trait. The allele for short tails is dominant (T) over the allele for long tails (t). A dog breeder mates two short-tailed dogs (parents). One parent is homozygous and the other is heterozygous for this trait. A litter of twelve puppies, all with short tails, is produced (first generation). The breeder mates one of the first generation dogs with a short-tailed dog from another litter. A litter of ten puppies is produced (second generation). The breeder is surprised when one of the second generation puppies has a long tail. Describe the genetic make-up of the parents and puppies that produced this inheritance pattern.
Trace path from the femoral vein in a healthy female to the lower lobe of the right lung via the right pulmonary artery. Explain all major structures on the way.
When a sperm cell comes into contact with an egg cell, there is a change in the electrical charge across plasma membrane and various channel proteins close. What are these channels known as.
Assume that a spherical cell, with a diameter of 24 ?m, has spherical mitochondria, each with a diameter of 0.24 ?m. If mitochondria occupy 13.7% of the volume of the cell, how many mitochondria are there?
Distinguish between the sympathetic and parasympathetic motor pathways of the autonomic nervous system? Identify body responses that are characteristic of both systems.
In cats, hair length is a trait that is controlled by a gene with 2 alleles. The dominant allele codes for a protein that produces short hair, and the recessive allele codes for a protein that produces long hair.
IN humans, normal pigmentation is due to a dominant gene A. Albinism is due to the recessive allele a. A man without albinism marries an albino woman and their fist child is an albino. What are the genotypes of these 3 people?
Assume you are working to characterize a novel protein in mice. Analysis shows that high levels of the primary RNA transcript that codes for the protein are found in tissue from the brain.
While a tall homozygous plant was crossed with a short homozygous plant, the F1 offspring were all tall. No short plants were present in the F1 generation. Which principle does this situation represent.
Alleles for sickle-cell anemia have persisted in the population because they confer a selective advantage in the heterozygote by providing increased resistance to malaria.
q1. in a laboratory experiment with three groups one group of people drinks pure water the second drinks an equal
q1. true-breeding tall red-flowered plants are crossed with dwarf white-flowered plants. the resulting f generation
Discuss in three sentences or less why DNA polymerases alone cannot initiate complementary strand formations.
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