In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A recessive lethal allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons. What would be the sex ratio in the offspring of a cross between a male that is heterozygous for the lethal allele and a normal female?

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#Question id: 32242

#Unit 2. Cellular Organization

Which of the following is a strict requirement for a protein to exit the endoplasmic reticulum (ER)?

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#Question id: 30082

#Unit 2. Cellular Organization

Hybrid dysgenesis is caused by which of the following transposable element?

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#Question id: 1561

#Unit 4. Cell Communication and Cell Signaling

The cells and signaling molecules involved in the initial stages of the inflammatory response are ?

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#Question id: 5795

#Unit 8. Inheritance Biology

Which characteristic of the genetic code lowers the likelihood of mutation.

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#Question id: 7305

#Unit 5. Developmental Biology

In plants, a growing mass of unorganized and undifferentiated cells that cover a wound; these cells can be induced to form a plant meristem and develop into shoots and/or roots called as