Find the distance in linkage map units of the recombinants (recombinants/total)x100: Mating: AaBb x aabb A...
Find the distance in linkage map units of the recombinants (recombinants/total)x100:
Mating: AaBb x aabb
A = albino, a = non-albino, B = Blue, b = white
Offspring:
(AaBb) Albino / Blue = 1120
(aaBb) Non-albino / blue = 100
(Aabb) Albino / white = 150
(aabb) Non-Albino / white= 1130
Homework Answers
Answer:
AaBb x aabb
- the offsprings of the above cross are parental type( non recombinants) or non parental type ( recombinants).
- The recombinants have the lowest frequency, therefore non hairy/ early and hairy/ late are recombinant progeny.
- The distance between the hairness gene and flower fertility gene = (number of recombinant offsprings/ total offsprings) x 100
- = ( 150 + 100 / 1120 + 150 + 100 + 1130) x 100
- = 250 / 2500 x 100
- = 10 map units
- 11 &12) The distance in map units does not tell the actual physical distance in basepairs between the genes.
- It also does not tell the base composition of the two genes.
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Find the distance in linkage map units of the recombinants
(recombinants/total)x100:
Mating: AaBb x aabb
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I have a answered but i would like help with part B.
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question 5-52
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please help with these 3 questions. thank you!
Name: A cross between individuals with genotypes AaBb x aabh produces the following offspring. Genotype Number of offspring AaBb Aabb aaBb aabb a. Do the evidence suggest that the a and b loci are linked? Explain your answer. b. What is the map distance between a and b? (Show your work.) c. Are the A and B loci in coupling or repulsion in the heterozygous parent? 4. You perform a testcross between...
Can you explain how to formulate map units in these types of
questions?
I have a answered but i would like help with part B.
2. Recombination frequency is given below for several gene pairs. Create a linkage map for these genes, showing the map unit distance between loci. j, k 12%; k, 1 6%; j, m 9%; 1, m 15% 3. In guinea pigs, black (B) is dominant to brown (b), and solid color (S) is dominant to spotted...
13. Creighton and McClintock worked with homologous chromosomes physically exchange genetic information during crossing over and their model system to show that A) Peas B. Corn 14. While mapping two genes in Drosophila you observe 40 recombinants among 200 total A) 30 map units 15. Another name for a chromosome is C. Fruit flies D. Tobacco offspring. What is the distance between these genes? B. 20 map units C200 map units D. 6.67 map units , since it contains genes...
How to do 21 and 23?
50 map units 5 map units Linkage groups d. 92 ty results from a rare, sex-limited nal puberty (P) and is expressed brother Jack and his sister Beth 10 and 14. Although Bill's mother uncles (his mother's brothers) underwent normal puberty. aploid sets of e nucleolar organizers for numbers 17-20 below) Male-limited precocious puberty results autosomal allele (P) that is dominant over the allele for normal pube only in males. Bill undergoes precocious puberty,...
How to do
23?
50 map units 5 map units Linkage groups d. 92 ty results from a rare, sex-limited nal puberty (P) and is expressed brother Jack and his sister Beth 10 and 14. Although Bill's mother uncles (his mother's brothers) underwent normal puberty. aploid sets of e nucleolar organizers for numbers 17-20 below) Male-limited precocious puberty results autosomal allele (P) that is dominant over the allele for normal pube only in males. Bill undergoes precocious puberty, but his...
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