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: 4339

#SCPH01 Biochemistry

In positive control of several sugar metabolism-related operons, the cAMP receptor protein (CRP) binds to DNA to stimulate transcription. Which of the following environmental conditions causes an increase in CRP activity in stimulating transcription?

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#Question id: 13053

#SCPH01 Biochemistry

What would the generally expected effect on the PCR reaction be of adjustments that increase the temperature of the annealing phase and the length of the elongation phase?

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#Question id: 19339

#SCPH28 | Zoology

The troponins and myoglobins are type of biomarkers of ______ disease?

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#Question id: 23147

#SCPH06 I Botany

In fluorescence microscopy why the fluorescence occurs at longer wavelength when there shorter   wavelength of light is applied?

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#Question id: 348

#SCPH01 Biochemistry

Sulfur is in the same column of the periodic table as oxygen, but has electronegativity similar to carbon. Compared to water molecules, molecules of H2S will ________.