Biology 1001A Lecture Notes - Lecture 11: Indel, New Zealand National Rugby Union Team, Cyclic Adenosine Monophosphate

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sapphirebear815

3 Apr 2016

School

Western University

Department

Biology

Course

Biology 1001A

Professor

Scott Mac Dougall- Shackleton

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Document Summary

Spores germinate into gametophytes that make gametes by mitosis. Epistasis is a result of gene products interacting. They are the most common alleles in a population. Isolate mendelian pigs: brown pigs one on side, black pigs on other side: they are now true-breeding. Pigmentation results from production of melanin in cells called melanocytes: package melanin into organelles called melanosomes, export melanosomes from melanocyte into nearby skin cells. Two kinds of melanin in stimulation: black and red melanin: no brown melanin!, brown is combination of black and red. Normal allele results in brown pigmentation because sometimes it produces black and sometimes it produces red. If a pig carries copies of two different alleles (that is, if the pig is a heterozygote), each of its melanocytes will have two different types of mc1r proteins. Half the mc1rs will be built according to instructions encoded in one allele; the other half will be built according to instructions encoded in the other allele.

Related Questions

In need of assistance. Please help answer the following.

1) Pure-breeding yellow guinea pigs crossedwith pure-breeding white guinea pigs produce only cream-coloredoffspring. This pattern indicates incomplete dominance. Rough hairis found to be dominant to smooth hair. Give the F1 and F2genotypic and phenotypic ratios of a cross of a smooth white guineapig with a homozygous rough yellow guinea pig.

2) A breeder of cattle has a herd of white cowsand a roan bull. Hair color in this breed is controlled by anincomplete dominant gene. The two homozygous forms are either redor white, and the heterozygous is roan. Answer the followingquestions please

What color calves are expected and in whatproportion?

Outline a procedure to develop an all-redherd.

3) In horses, black coat color is influenced bythe dominant allele (B), and chestnut coat color is influenced bythe recessive allele (b). Trotting gait is due to a dominant gene(T), pacing gait to the recessive allele (t). If a homozygous blacktrotter is crossed with a chestnut pacer:

What will be the appearance of the F1 and F2generations?

Which phenotype will be the most common?

Which genotype will be the most common?

Which of the potential offspring will be certain tobreed true?

4) In garden peas, one pair of alleles controlsthe height of the plant and a second pair of alleles controlsflower color. The allele for tall (D) is dominant to the allele fordwarf (d), and the allele for purple (P) is dominant for the allelefor white (p). A tall purple crossed with a tall purple produces Â¾tall purple and Â¼ tall white. What is the genotype of the parents?

5) Three alleles control the ABO blood types.I^A and I^B are codominant genes, so thecombination of I^AI^B produces the AB bloodtype. The third allele I^ois recessive to the other twoalleles. Indicate which of these parents could produce the givenchild and submit your response to the instructor.

A X AB produce B child.

A X O produce A child.

A X B produce O child.

A X AB produce O child.

A X AB produce B child.

B X B produce O child.

AB X AB produce A child.

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Biology 1001A Lecture Notes - Lecture 11: Indel, New Zealand National Rugby Union Team, Cyclic Adenosine Monophosphate

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