TLS Online TPP Program

#Question id: 15781


Chemical regulation of stem cells takes the form of secreted proteins from surrounding cells that influence stem cell states and progenitor differentiation through endocrine, paracrine, or juxtacrine mechanisms. These signaling factors:

#Unit 5. Developmental Biology
  1. Maintain the stem cell in an uncommitted state.
  2. Maintain the stem cell in an committed state
  3. Maintain the stem cell in an differentiated state
  4. Maintain the stem cell symmetrical division
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TLS Online TPP Program

#Question id: 3626

#Unit 8. Inheritance Biology

The major blood group locus in humans produces types A (genotypes AA or AO), B (genotypes BB or BO), AB (genotype AB), or O (genotype OO). Parents who are type AB and type O, what are the possible blood types of their offspring?

TLS Online TPP Program

#Question id: 3627

#Unit 8. Inheritance Biology

A cross is made between two plants with white flowers. All the F1 progeny had red colored flower. This is because of

TLS Online TPP Program

#Question id: 3628

#Unit 8. Inheritance Biology

Two mutant plants, both bearing white flowers, were crossed. All F1 plants had red colored flowers. Which one of the following conclusions is correct?

TLS Online TPP Program

#Question id: 3629

#Unit 8. Inheritance Biology

Complementation test for four different mutant phenotype 1, 2 , 3 and  4 were allowed and detect phenotype given table

Pair of mutant                                         phenotype

1 & 4                                                         wild                             

1 & 3                                                         wild

2 & 3                                                         wild  

2 & 4                                                         mutant

What are number of citron that four mutant were belong

TLS Online TPP Program

#Question id: 3634

#Unit 8. Inheritance Biology

In the pearl millet plant, color is determined by three alleles at a single locus: Rp1 (red), Rp2 (purple), and Rp3 (green). Red is dominant over purple and green, and purple is dominant over green (Rp1 >Rp2 >Rp3). Which of the following parental cross would produce ½ had red, ¼ purple, ¼ green?

TLS Online TPP Program

#Question id: 3630

#Unit 8. Inheritance Biology

In the pearl-millet plant, color is determined by three alleles at a single locus: Rp1 (red), Rp2 (purple), and rp (green). Red is dominant over purple and green, and purple is dominant over green (Rp1 > Rp2 > rp). What will be expected phenotypes and ratios of offspring produced by the Rp1/rp × Rp2/rp crosses?