A plant with purple flowers is crossed with a plant with white flowers, and the F1 are self-fertilized to produce 105 F2 progeny with purple flowers and 45 with white flowers.

A scientist hypothesized that there are two genes with identical functions that control the dominant trait. The scientist also proposed that the two genes are not linked. The scientist carried out a chi-square test to test the hypothesis. Which one of the following options is the correct chi-square value obtained by the scientist?

TLS Online TPP Program

#Question id: 4307

#Unit 3. Fundamental Processes

When taken up by a cell, which of the following molecules binds to a repressor so that the repressor no longer binds to the operator?

TLS Online TPP Program

#Question id: 24250

#Unit 2. Cellular Organization

Core histone are recognised by the presence of

TLS Online TPP Program

#Question id: 8960

#Unit 9. Diversity of Life Forms

With the current molecular-based phylogeny in mind, rank the following from most inclusive to least inclusive.

1. ecdysozoan

2. protostome

3. eumetazoan

4. triploblastic

TLS Online TPP Program

#Question id: 1223

#Unit 4. Cell Communication and Cell Signaling

The receptors for steroid hormones are located inside the cell instead of the membrane surface like most other signal receptors. How do steroids gain access to their receptors?

TLS Online TPP Program

#Question id: 2036

#Unit 4. Cell Communication and Cell Signaling

Certain microorganism such as Salmonella, Listeria, Neisseria, Cryptococcus consist of specific carbohydrate moieties on the surface antigen that activate