Data, collected from DNAs of a great many different species, led Chargaff to the following conclusions:

A. The base composition of DNA generally varies from one species to another.

B. DNA specimens isolated from different tissues of the same species have the different base composition.

C. The base composition of DNA in a given species changes with an organism’s age, nutritional state, or changing environment.

D. In all cellular DNAs, the sum of the purine residues equals the sum of the pyrimidine residues.

Which of the above statements are INCORRECT regarding Chargaff’s rule?

#Question id: 12139

#Unit 8. Inheritance Biology

#Question id: 5472

#Unit 8. Inheritance Biology

Plant height of wild Solanum nigrum is controlled by four pair of polygene. A plant genotype AaBBCcDd with 150 cm height but B plant genotype aabbccdd with 125 cm height present in their population. Following some plants with genotype AABBCCDD, AaBbCCDD, AabbccDD, aaBBccdd and their expected height in cm respectively is

#Question id: 5471

#Unit 8. Inheritance Biology

A plant height in Maize is control by 3 pair of polygene. Two varieties of maize averaging 120 and 90 inches in height, respectively, are crossed. The F1 progeny is quite uniform averaging 105 inches in height. What will be height phenotype of F2 progenies ?

#Question id: 5470

#Unit 8. Inheritance Biology

Numerous pure breeding crosses are made between two inbred plant strains, one having a mean height at maturity of 96 cm and the other as 56 cm. The height of the F1 progeny at maturity averages close to 76 cm. Height of plant control by four pair of polygene. The F2 progeny show the following phenotype.

#Question id: 5469

#Unit 8. Inheritance Biology

Breeding experiment was performed on pure lines of tomatoes differing in fruit weight. The plants were all grown in a controlled environment chamber providing equal environmental conditions for all individuals as far as humanly possible. The results were as follows:

a) One dominants polygene contribution?

b) What will be frequency of 20 g in F2 CLASSES?

c) Number of polygene loci for this character.

#Question id: 5468

#Unit 8. Inheritance Biology

Plant height is control by polygenetic trait. Plant having height 6 cm are allowed to cross with plant having height 2 cm , all F1 progeny having height uniform 4 cm were allowed selfing to produced F2 progeny in which 5 out of 320 with height of 6 cm. What will be phenotype ratio in F2 generation?