How would one explain a testcross involving F1 dihybrid flies in which more parental-type offspring than recombinant-type offspring are produced?

TLS Online TPP Program

#Question id: 21969

#Unit 2. Cellular Organization

Choose the correct statement 

a. Interphase chromosomes occupy chromosome territories in the nucleus and are not entangled with each other

b. Heterochromatic regions, silenced genes, and gene-sparse regions of chromosomes are typically localized to the nuclear periphery

c. Interphase chromosomes occupy chromosome territories in the nucleus and are entangled with each other

d. Heterochromatic regions, silenced genes, and gene-sparse regions of chromosomes are typically localized to the nuclear centre

TLS Online TPP Program

#Question id: 23101

#Unit 2. Cellular Organization

Choose the incorrect statement 

TLS Online TPP Program

#Question id: 23102

#Unit 2. Cellular Organization

How many times DNA is folded/compacted when a 200bp DNA is wrapped over core histone 

TLS Online TPP Program

#Question id: 23103

#Unit 2. Cellular Organization

What is 1st level of compaction while making/packaging the nucleosome  

TLS Online TPP Program

#Question id: 23104

#Unit 2. Cellular Organization

Which of the following statement is true regarding second level of organization 

a. The second level of organization is the coiling of the 10-nm fiber of nucleosomes into a helical array.

b. The coiled helical array to constitute the fiber of diameter 30 nm that is found in interphase chromatin and in mitotic chromosomes.

c. This compacts the DNA - 40-fold. The structure of this fiber requires the histone tails and is stabilized by linker histones.

d. Histone H1, histone tails, and increased ionic strength all promote the formation of the 30-nm fiber.

TLS Online TPP Program

#Question id: 23105

#Unit 2. Cellular Organization

What is 2nd level (making 30 nm) of compaction while making/packaging the nucleosome