In this testcross: A B / a b X a b / a b what types of gametes are produced in complete linkage?
A) A B, a b, a B and A b
B) A B, a b
C) a B, A b
D) Aa Bb
Coupling vs Repulsion? The following testcross Aa Bb x aa bb produces 10 Aa Bb 40 Aa bb 40 aa Bb 10 aa bb Were the A and B alleles in the Aa Bb parent in coupling or repulsion and why?
Linkage a) how do you determine the types of gametes expected from a double heterozygous individual when there is linkage and when the genes assort independently. b) How do you identify the parental and the recombinant type gametes from data on the frequency of different types of offspring in a testcross and from information about the genotypes of the parents of the double heterozygote. c) How do you calculate the map distance when given testcross results.
If the a and b loci are 30 CM apart and an AA BB individual and an aa bb individual mate: What gametes will the F1 individuals produce, and in what proportions? What phenotypic classes in what proportions are expected in the F2 generation (assuming complete dominance for both genes) (show procedure, NO score for direct result)?
Given the Mendelian cross: Aa Bb gg Dd Ee Hh (father) X Aa Bb Gg dd ee Hh(mother). How many gametes are made by the father? How many by the mother? Select one: a. ¾, 1/4 b. 8,8 c. 32, 32 d. 64, 32 e. 32, 16 f. 16, 8
a. What is the frequency of gray, sleek testcross progeny? b. What is the frequency of pudgy, mean testcross progeny? c.What is the frequency of gray, friendly testcross progeny? d. What is the frequency of pudgy, friendly testcross progeny? e.What is the frequency of black, friendly testcross progeny? f. What is the frequency of black, pudgy, mean testcross progeny? g.What is the frequency of gray, sleek, mean testcross progeny? h. What is the frequency of gray, pudgy, friendly testcross progeny?...
What proportion of offspring from a testcross between a dihybrid and a homozygous recessive.(I.e. A/a;B/b x a/a;b/b) will be genotype A/a;b/b?
1. a. How many different gametes does a parent with the following genotype produce? Aa BB DD Ee b. How many different genotypes are found among the progeny of the cross listed below? aa bb Dd ee x Aa BB DD Ee c. How many different phenotypes are found among the progeny of the cross listed below? Aa Bb dd Ee x Aa Bb Dd Ee
11)_1 4 11) In a monohybrid cross AA x aa, what proportion of homozygotes is expected among the F2 offspring? А А (A) 1/4 B) None are homozygotes. C) All are homozygotes. D) 3/4 E) 1/2 Au A a a Au 12) In a dihybrid cross AA bb x aa BB, what proportion of the F2 offspring is expected to be. 12) – homozygous for at least one gene? A) 1/4 B) 1/2 C) 3/4 D) All are homozygotes. É)...
When two loci are completely linked, the offspring observed in a dihybrid testcross in the F2 are: a.) all the recombinant types b.) all the parental types c.) 50% of recombinant, and parental types d.) 25% of recombinant types, and 75% parental types e.) None of the above
1) Which of the following genotypes is homozygous: a) AaBB c) aaBb b) AABb d) aabb 2) ith A locus is: a) a recessive gene b) an unmatched allele c) the location of a gene on a chromosome d) holds two sister chromatids toghether Which of the following would represent a heterozygous genotype: a) Bb c) bb b) BB d) AA 3) 마. g 4) If a dog displays a recessive phenotype it genotype must be: a) either TT or...