Companion cells transport of photosynthetic products from producing cells in mature leaves to the sieve elements in the minor veins of the leaf. There are at least three different types of companion cells in the minor veins of mature, exporting leaves, All three cell types have dense cytoplasm and abundant mitochondria;

#Question id: 4811

#Unit 8. Inheritance Biology

Three incompletely link gene as a B-A-C order. A cross allowed between AAbbcc X aaBBCC produce f1 progeny allowed test cross. Which of the following offspring is a result of double cross over?

#Question id: 4812

#Unit 8. Inheritance Biology

Two character X and Y ,both follow law of dominance due to 3:1 F2 phenotypic ratio monohybrid cross separately If carry out dihybrid selfing cross for heterozygous genotype for both character does not follow law of independence assortment in normal environmental condition due to?

#Question id: 4813

#Unit 8. Inheritance Biology

You perform the three different two-factor crosses (Cross 1: XY and xy, Cross 2: YZ and yz, and Cross 3: XZ and xz). Assume all crosses are between diploid flies homozygous for the alleles of these genes. You observe 7% recombinants in the first cross, 20% recombinants in the second cross, and 13% recombinants in the third cross. if cross between XyZ and xYz leads to which of the followining recombinant with double cross over .

#Question id: 4814

#Unit 8. Inheritance Biology

The frequency of recombinant gametes is half the frequency of crossing over between genes present on same chromosome is due to

#Question id: 4815

#Unit 8. Inheritance Biology

The cross over percentage between linked genes J and M is 20%, J and L is 35%, J and N is 70%, L and K is 15%, M and N 50%. The sequence of genes on the chromosome is

#Question id: 4816

#Unit 8. Inheritance Biology

A wild-type fruit fly heterozygous for gray body color and normal wings was mated with a black fly with vestigial wings to produced 1000 offspring. Recombination frequency between these genes for body color and wing type is 20 %. What number of offspring that is gray body colour and normal wing?