#Question id: 13033
#Unit 13. Methods in Biology
#Question id: 4771
#Unit 8. Inheritance Biology
The normal eye color of Drosophila is red, but strains in which all flies have brown eyes are available. Similarly, wings are normally long, but there are strains with short wings. A female from a pure line with brown eyes and short wings is crossed with a male from a normal pure line. The F1 consists of normal females and short-winged males. An F2 is then produced by intercrossing the F1. Both sexes of F2 flies show phenotypes as follows:
Are genes for eye color and wing length x link or autosome?
#Question id: 28435
#Unit 5. Developmental Biology
Primitive Streak is first arises from which area or cells?
#Question id: 12895
#General Aptitude
Surface areas of three adjacent faces of a cuboid are p, q, r. Its volume is
#Question id: 2909
#Unit 2. Cellular Organization
The DNA can be labeled and used to probe a microarray, yielding a map of genomic sequences to which those particular nucleosomes bind. Because microarrays are often referred to as chips, this technique is called a ChIP-chip experiment. This experiment is designed to reveal the genomic DNA sequences to which a particular histone variant binds.
I. Chromatin is isolated from the cells and digested briefly with micrococcal nuclease (MNase).
II. A histone variant with an epitope tag is introduced into a particular cell type, where it is incorporated into nucleosomes.
III. The DNA bound by nucleosomes is protected from digestion, but the linker DNA is cleaved, releasing segments of DNA bound to one or two nucleosomes.
IV. The pattern of hybridization on the microarray reveals the DNA sequences bound by the nucleosomes with the histone variant.
V. Antibody is added, and the nucleosomes containing the epitope-tagged histone variant are selectively precipitated.
VI. The DNA in these nucleosomes is extracted from the precipitate, labeled, and used to probe a microarray representing all or part of the genomic sequences of that particular cell type.
Arrange the following statements in the correct order in which they are done.