Following statements are regarding to the fluidity of a bilayer.

A. A lipid bilayer cools below a characteristic transition temperature, it undergoes a sort of phase change in which it becomes a liquid; that is, it loses its fluidity.

B. Above the transition temperature, the highly mobile lipids are in a state known as a liquid crystal.

C. The bilayer is thicker in the gel state than in the liquid crystal state due to the stiffening of the hydrocarbon tails at lower temperatures.

D. The transition temperature of a bilayer decreases with the chain length and the degree of saturation of its component fatty acid residues for the same reasons that the melting points of fatty acids increase with these quantities.

Which of the following combination is correct?

#Question id: 4775

#Unit 8. Inheritance Biology

Which of the following is correct observe for above genetic cross? 

#Question id: 4776

#Unit 8. Inheritance Biology

True breeding agouti mice with genotype AABB were cross to true breeding albino mice with genotype aabb. All F1 offspring having agouti phenotype were allowed to intercross to produce F2 progeny as following 

                                 A- B -          agouti,

                                 aa B-            black

                                 --  bb            albino

Following genetic cross and there proportional?

#Question id: 4777

#Unit 8. Inheritance Biology

Two non allelic genes P and Q governed Glume color in sorghum.

P... qq  = blakish purple           P.. Q...  = raddish purple

pp Q...  = brown                      ppqq    =  brown  

A cross was allowed between PpQq and ppQq. What is proportional of their progeny with Blakish, Raddish and brown respectively? 

#Question id: 4778

#Unit 8. Inheritance Biology

The following is the biochemical pathway for purple pigment production in flowers of sweet pea: A cross is made between two parents with the genotype: Aabb x AaBb. What is proportional of plant with purple pigment?

#Question id: 4779

#Unit 8. Inheritance Biology

Fruit color in eggplant due to interaction of three non-allelic genes A, B and C.  These three non-allelic genes are produce purple phenotype when they come together or separately. Following some genotype and their phenotype is given.

                                  A- -- --         Purple

                                 -- B- --         Purple

                                 -- -- C-         purple

                                 aabbcc         White    

 A Plant genotype AaBbcc was cross to plant with genotype aabbcc. What is probability of white phenotype among their offspring?

#Question id: 4780

#Unit 8. Inheritance Biology

In chickens, comb shape is determined by alleles at two loci (R, r and P, p). A walnut comb is produced when at least one dominant allele R is present at one locus and at least one dominant allele P is present at a second locus (genotype R_ P_). A rose comb is produced when at least one dominant allele is present at the first locus and two recessive alleles are present at the second locus (genotype R_pp). A pea comb is produced when two recessive alleles are present at the first locus and at least one dominant allele is present at the second (genotype rrP_). If two recessive alleles are present at the first and at the second locus (rrpp), a single comb is produced. Which of the following cross would produce ½ walnut and ½ pea comb ?