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TLS Online TPP Program

#Question id: 4717

 If Darwin had been aware of genes and their typical mode of transmission to subsequent generations, with which statement would he most likely have been in agreement?

#Unit 11. Evolution and Behavior

  1. If natural selection can change gene frequency in a population over generations, given enough time and genetic diversity, then natural selection can cause sufficient genetic change to produce new species from old ones.

  2. If an organism's somatic cell genes change during its lifetime, making it more fit, then it will be able to pass these genes on to its offspring.

  3. If an organism acquires new genes by engulfing, or being infected by, another organism, then a new genetic species will result.

  4. A single mutation in a single gene in a single gamete, if inherited by future generations, will produce a new species.

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TLS Online TPP Program

#Question id: 22955

#Unit 5. Developmental Biology

Based On ABC model during flower development, loss of class A activity results the formation of only stamen and carpel. Which of the flowering floral organs identity genes controls the class  A activity ?
TLS Online TPP Program

#Question id: 22956

#Unit 5. Developmental Biology

Individual and overlapping expression of homeotic genes in adjacent whorl of a flower determine the pattern of floral organ development. In an Arabidopsis mutant, floral organs are distributed as follows
WHORL 1 Sepal
WHORL 2 Petal
WHORL 3 Petal
WHORL 4 Sepal
Loss of function mutation in which one of the following genes would have caused the above pattern of floral organs development 
TLS Online TPP Program

#Question id: 22957

#Unit 5. Developmental Biology

floral organ development is controlled by overlapping expressions of A class , B class and C class genes in different whorls. In an Arabidopsis mutant, the floral whorls had following pattern:
Sepal àSepal àcarpel àcarpel 
Mutation in which one of the following class of gene causes above pattern.  
TLS Online TPP Program

#Question id: 22958

#Unit 5. Developmental Biology

Which of the following statement is correct regarding to the flower development in Arabidopsis?
TLS Online TPP Program

#Question id: 7288

#Unit 5. Developmental Biology

Following statements are regarding to the expression of genes in floral quartate model in Arabidopsis thaliana.

A. Sepals- AP1(heterodimer) + SEP(homodimer)

B. Petals-AP1(monomer)+PI(monomer)+AP3(monomer)+SEP(monomer)

C. Stamens- AP3(monomer)+PI(monomer)+AG(monomer)+SEP(monomer)

D. Carpels- AG(homodimer)+SEP(homodimer)

Which of the following genetic combinations are incorrect?
TLS Online TPP Program

#Question id: 7294

#Unit 5. Developmental Biology

Multiple factors regulate flowering in Arabidopsis. FT mRNA is expressed in companion cells of the leaf vein in response to multiple signals, including day length, light quality, and temperature. FT moves in the phloem from leaves to the apical meristem. FT is unloaded from the phloem in the meristem and interacts with FD.

FT-FD complex activates multiple genes. Which of the following combination is correct?(SS)