TLS Online TPP Program

#Question id: 4577


Which of these is a statement that Darwin would have rejected?

#SCPH28 | Zoology
  1. Environmental change plays a role in evolution.

  2. The smallest entity that can evolve is an individual organism.

  3. Individuals can acquire new characteristics as they respond to new environments or situations.

  4. Inherited variation in a population is a necessary precondition for natural selection to operate.

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TLS Online TPP Program

#Question id: 777

#SCPH05 I Biotechnology

The first miRNA identified in C.elegans was named__________

TLS Online TPP Program

#Question id: 5050

#SCPH28 | Zoology

A stem cell capable of producing all the cell types of a lineage(embryonic and extraembryonic) is said to be-

TLS Online TPP Program

#Question id: 15149

#SCPH12 I Genetics

In this problem we will explore some of the many ways that mutations in two different genes can interact to produce different Mendelian ratios. Consider a hypothetical insect species that has red eyes. Imagine mutations in two different unlinked genes that can, in certain combinations, block the formation of red eye pigment yielding mutants with white eyes. In principle, there are two different possible arrangements for two biochemical steps responsible for the formation of red eye pigment. The two genes might act in series such that a mutation in either gene would block the formation of red pigment. Alternatively, the two genes could act in parallel such that mutations in both genes would be required to block the formation of red pigment.
Further complexity arises from the possibility that mutations in either gene that lead to a block in enzymatic activity could be either dominant or recessive. If the crosses is made between a wild type insect with red eyes and a true breeding white eyed strain with mutations in both genes. Such considerations yield the Pathways in series with recessive mutations in both genes, what will be the phenotype in F1 progeny?

TLS Online TPP Program

#Question id: 10503

#SCPH05 I Biotechnology

A Pseudomonas species that synthesizes the antifungal compound against the pathogenic fungus Gaeumannomyces graminis known as

TLS Online TPP Program

#Question id: 5067

#SCPH06 I Botany

The yolky eggs of birds undergo: