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The pattern of coat coloration in dogs is determined by the alleles of a single gene, with S (solid) being dominant over s (spotted). Black coat color is determined by the dominant allele A of a second gene, and homozygous recessive aa animals are tan. A female having a solid tan coat is crossed with a male having a solid black coat and produces a litter of six puppies. The phenotypes of the puppies are 2 solid tan, 2 solid black, 1 spotted tan, and 1 spotted black. What are the genotypes of the parents?
Illustrate the environmental conditions that would favour sexual reproduction over asexual reproduction in Hydra. What is the possible evolutionary reason for having two different reproductive strategies.
Using examples, discuss types of genetic mutations that result in faulty proteins and disease,
What are the characteristics of life? There are some things, like planets, stars, viruses and prions that have many of the characteristics of life, but are not alive.
If a cell with 2n=4 chromosomes failed to separate homologous chromosome pairs correctly during meiois, so that one pair went to one daughter cell and other cell received no copy,
A plant increased from one of Mendel's yellow pea is selfed. Three progeny peas from this are obtained and they are all green. Is the original plant homozygous or heterozygous.
Discuss how many ways can these chromosomes be assorted into gametes and how many different chromosome combinations are possible when crossing two unrelated flies?
Assyme you are shown an object that looks superficially like a pale green mushroom. Explain at least three criteria that would enable you to tell whether the object is a piece of a plant or a piece of a fungus.
Sketch a diagram that illustrates how you would expect the triglyceride and phospholipid molecules to interact with the water. Be sure to indicate structures, if any that might form as a result of these interactions.
The main ecological imbalance on Earth is between the human species and the rest of Earth's biota. Determine two specific actions we could do to achieve a balance
Describe how the genetic material is organized in this virus. Monarch butterfly populations are found east and west of the Rocky Mountains. How could DNA fingerprinting technology be used to start that they constitute one breeding population or two s..
Biotechnology allows us to employ living organisms or their processes for human needs or purposes. Research how biotechnology is used today. Discuss one use of biotechnology, answering the following questions:
If an albino (autosomal recessive trait) woman is married to a man with normal colouring and they have an albino child, what is a genotype of the man.
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