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In tomato plant, red (R) is dominant over yellow (r) for fruit color and purple (P) is dominant over green (p) for stem color. Fruit color and stem color assort independently. The number of progeny plants of different fruit/stem colors obtained from a mating are as follows:
Red fruit, purple stem - 145
Red fruit, green stem - 184
Yellow fruit, purple stem - 66
Yellow fruit, green stem - 47
What are the genotypes of the parent plants in this mating?
With reference to 'stem cells', frequently in the news, which of the following statements is/are correct? 1. Stem cells can be derived from mammals only. 2. Stem cells can be used for screening new drugs. 3. Stem cells can be used for medical therapies. Select the correct answer using the codes given below.
With reference to 'stem cells', frequently in the news, which of the following statement(s) is/are correct?
1. Stem cells can be derived from mammals only.
2. Stem cells can be used for screening new drugs.
3. Stem cells can be used for medical therapies.
Select the correct answer:
Which of the following statement(s) is/are CORRECT for antigen activated effector T cells?
P. CD4+ cells make contact with macrophages and stimulate their microbicidal activity.
Q. CD4+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
R. CD8+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
S. CD8+ cells make contact with virus infected cells and kill them.
Empirical studies have shown that the women students are underrepresented in the disciplines such as science, technology, engineering, and mathematics (STEM). Its possible reasons could be (A) Women students do not feel comfortable with STEM subjects. (B) Women students cannot excel in STEM subjects (C) Women students lack aptitude in STEM subjects (D) Women students face threats due to negative stereotypes. (E) Women students are not encouraged by their parents to join STEM disciplines. Choose the correct answer from the options given below:
In the question two statements are given, followed by two conclusions, I and II. Read all the conclusions and then decide which of the given conclusions logically follow/s from the given statements. Statements: All white blood cells are red blood cells. Some blood cells are red blood cells. Conclusions: I. All blood cells are red blood cells, is a possibility. II. Some red blood cells are not blood cells.
Consider the following statements regarding ‘Embryonic Stem (ES) cells: 1. These cells are derived from eggs fertilized in a woman's body. 2. The Embryonic cells are pluripotent. 3. The cells derived from ES cells can be used to replace/restore tissues that have been damaged by disease or an injury. Which of the following statement is/ are correct?
With reference to stem cells, which of the following statements is/are correct? 1. They do not have any tissue-specific structure. 2. They can carry oxygen in the blood but cannot pump blood through the body like heart cells. 3. Bone marrow and Peripheral blood tissue are the sources of stem cells. Select the correct answer using the codes given below:
Hematopoietic stem cells (HSCs) are the stem cells that give rise to other blood cells.
Which of the following statements are NOT true? a) The number of cells in an elephant is more than number of cells in a monkey b) The size of cells in an elephant is larger than size of cells in a monkey c) Shape of cells in an elephant is different than shape of cells in a monkey