#Question id: 4898
#Unit 8. Inheritance Biology
A three point test cross was carried out in Drosophila melanogaster involving three adjacent genes A, B and C. arranged in the same order. The distance between A to B is 15 map unit (mu) and that between B to C is 30 map. The coefficient of coincidence = 0.67. What is the percentage of double recombinants in the progeny obtained from the testcross?
#Question id: 4897
#Unit 8. Inheritance Biology
When two independent pure lines AAbb and aaBB of pea with white flowers are crossed, the F1 progeny has purple flowers. Gene A and B link at 20 map unit. The following conclusions were made
A. When an heterozygous individual of the genotype AaBb is test crossed, progenies with purple and white in a ratio of 1:3
B. When an heterozygous individual of the genotype AaBb is test crossed, progenies with purple and white in a ratio of 1:9
C. This is an example of complementary gene action
D. The F2 progeny obtained on selfing shows both pruple and white flower in a ratio of 9:7
Which of the following conclusions are correct?
#Question id: 4896
#Unit 8. Inheritance Biology
A cross between individuals with genotypes AaBbX aabb produces the following progeny:
AaBb - 21, aaBb- 83, Aabb- 77, aa bb -19
Which of the following statements is true?
a) Map unit between gene A and B
b) Configuration
c) parents genotype of AaBb
#Question id: 4895
#Unit 8. Inheritance Biology
What is the difference between a linkage map and a physical map?
a) Genetic maps are based on recombination frequencies, but physical maps are based on restriction digestion.
b) Physical DNA map describes the absolute position of genes on a chromosome while genetic map so variable
c) Genetic maps are important to identify the origin of diseases, whether they are inherited or arise due to a random mutation.
#Question id: 4894
#Unit 8. Inheritance Biology
Following is figure showing restriction site on coding gene. Which of the following is mode of inheritance?
#Question id: 4893
#Unit 8. Inheritance Biology
In tomatoes, tall (D) is dominant over dwarf (d) and smooth fruit (P) is dominant over pubescent fruit (p), which is covered with fine hairs. A farmer has two tall andsmooth tomato plants, which we will call plant A and plant B. The farmer crosses plants A and B with the same dwarf and pubescent plant and obtains the following numbers of progeny
a. The genotypes of both plant A and plant B are DdPp
b. In plant A, Gene D and Gene P link as cis configuration
c. In plant B, Gene D and Gene P link as cis configuration
d. In plant A, Gene D and Gene P link as trans configuration
e. In plant B, Gene D and Gene P link as trans configuration
Which of the following above statement are not correct?