In a particular species of mammal black hair (B) is dominant to green hair (b) and red eyes (R) are dominant to white eyes (r). If a BbRr individual is mated with a bbrrindividual the expected phenotypic ratio of the offspring is 1 black-red : 1 black-white: 1 green-red : 1 green-white. However, when you mate these individuals you find that the phenotypic ratio of the offspring is 6 black-red :1 black-white : 1 green-red : 6 green-white. What could account for this difference?

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#Question id: 5606

#SCPH01 Biochemistry

During which one of the following stages of A. thaliana embryogenesis, cell elongation throughout the embryonic axis and further development of the cotyledons occur?

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#Question id: 5607

#SCPH01 Biochemistry

Developmental changes that occur when different parts of an organism grow at different rates, phenomenon known as-

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#Question id: 5608

#SCPH01 Biochemistry

Stereoblastulae -

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#Question id: 5609

#SCPH01 Biochemistry

Just before sperm addition, sea urchin eggs are microinjected with a calcium chelator. What event will most likely not takes place after fertilization?

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#Question id: 5610

#SCPH01 Biochemistry

The acrosome reaction involves the extension of the acrosomal Process:

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#Question id: 5611

#SCPH01 Biochemistry

Which ion play an essential role in pollen tube growth?