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TLS Online TPP Program

#Question id: 5104

 In humans, identical twins are possible because ________.

#Unit 5. Developmental Biology

  1. cytoplasmic determinants are distributed unevenly in unfertilized eggs

  2. extraembryonic cells interact with the zygote nucleus

  3. early blastomeres can form a complete embryo if isolated

  4. the gray crescent divides the dorsal-ventral axis into new cells

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TLS Online TPP Program

#Question id: 6983

#Unit 5. Developmental Biology

In vertebrates, the heart forms from:
TLS Online TPP Program

#Question id: 6984

#Unit 5. Developmental Biology

Which of the following genes is unlikely to be involved in preaxial polydactyly in mice?
TLS Online TPP Program

#Question id: 6985

#Unit 5. Developmental Biology

The ventricular proliferative zone is:
TLS Online TPP Program

#Question id: 6986

#Unit 5. Developmental Biology

The use of segments as a developmental strategy in vertebrates is evident in:
TLS Online TPP Program

#Question id: 6987

#Unit 5. Developmental Biology

Which of the following statements about axon-guidance is TRUE?
TLS Online TPP Program

#Question id: 6988

#Unit 5. Developmental Biology

Many cells in the body divide only rarely, if at all; neurons, red blood cells, and keratinocytes are extreme examples. In which portion of the cell cycle would such cells be considered to be?