Biology Answers

The Hamster Pet Farm ordered a pair of black-haired for breeding. The first generation was all black hamsters. When the Farm mated hamsters of the first generation, one of the offspring turned out to be white. The Pet Farm said this must have been caused by a "hidden gene. For full marks-You must use, showing your understanding of these concepts to answer a below: Punnett Square, hybrid, pure, dominant, recessive, predict or chance, genotype-phenotype. This is worth 12 points so it should NOT be one sentence. a) Why did this happen? Explain the "hidden gene' and how one of the offspring could have been white in this family of hamsters. b) How could the owner get PURE black hamsters for mating.

Explain what you consider to be the positive and negative aspects of cloning both scientifically and morally, giving at least three ‘for’ and three ‘against’ points – Discuss whether you think it is a good use of science and will benefit mankind or whether you believe it is unethical and should no longer be pursued? You can expand this discussion outside of therapeutic cloning if you wish and consider the idea that one day it may also be possible to clone whole human beings.

Identify and explain the three processes that lead to variation in the gene pool.

List and explain the structure of skeletal muscle from the individual cell to the complete organ.

Describe how skeletal muscle allows for both fine motor movement (like picking up a pencil and writing) and gross motor movement (like moving a piece of furniture across the room).

Explain how muscles contract - making reference to: Sliding filament theory, Z bands, Actin and Myosin.

In humans the ability to roll your tongue is a dominant trait. If Jean Poole, who is heterozygous and can roll her tongue, and Reece Granger, who can roll his tongue but is homozygous have a child, what will be the genotypic and phenotypic ratios for their offspring possibilities?

Compare and contrast diffusion, osmosis, facilitated diffusion and active transport. In other words, what are the similarities AND differences between the different means of crossing a membrane. Be sure to discuss concentration gradient, use of proteins, what is crossing the membrane, and energy requirements.

what is chromatin

The diploid cells of a moose (Alces alces) contain 54 chromosomes. A non-disjunction in meiosis I of a moose germ cell would form how much chromosomes