Final answer:
Murray Barr was the scientist who first discovered the darkly staining bodies in the nuclei of cells from female cats, which were later shown to be the inactive X chromosomes.
The answer is option ⇒c. Murray Barr
Step-by-step explanation:
Further research revealed that Barr bodies are the inactivated X chromosomes in female mammals. In mammals, females typically have two X chromosomes, while males have one X and one Y chromosome. To achieve a balanced gene expression between males and females, one of the X chromosomes in females becomes inactivated in each cell. The inactivated X chromosome condenses into a Barr body, which can be observed under a microscope.
Murray Barr's discovery of Barr bodies provided a key insight into the process of X chromosome inactivation and its role in gene regulation. His work has contributed to our understanding of the complex mechanisms that underlie sex determination and gene expression in mammals.rr.
The answer is option ⇒c. Murray Barr