Cystic fibrosis is caused by a recessive lethal gene and can be detected by an excess concentration of chloride in sweat. A normal man whose sister has cystic fibrosis, his normal wife whose brother has cystic fibrosis. What is chance of cystic fibrosis in their child?

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#Question id: 5581

#SCPH28 | Zoology

In humans, an individual with an XXY chromosomal complement will develop as

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#Question id: 5582

#SCPH01 Biochemistry

Secretion of Müllerian-inhibiting substance by Sertoli cells:

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#Question id: 5583

#SCPH01 Biochemistry

In mammals, dosage compensation is carried out by:

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#Question id: 5584

#SCPH01 Biochemistry

Which one of the following provides rapid block to polyspermy during sea urchin fertilization?

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#Question id: 5585

#SCPH01 Biochemistry

Hermaphrodite is the sexual phenotype of a gain-of-function transformer-1 in both X and XX of C. elegans. Which of the following loss-of-function will also result in hermaphrodite regardless of copy number of X?

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#Question id: 5586

#SCPH01 Biochemistry

Plants exhibit an astounding capacity for perpetual growth throughout their life span, a phenomenon known as