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Therefore 1:1 is the equilibrium ratio. In modern language, the 1:1 ratio is the evolutionarily stable strategy (ESS). [10] This ratio has been observed in many species, including the bee Macrotera portalis. A study performed by Danforth observed no significant difference in the number of males and females from the 1:1 sex ratio. [11]
A high-ranking male mandrill advertises his status with bright facial coloration. [1]In the zoological field of ethology, a dominance hierarchy (formerly and colloquially called a pecking order) is a type of social hierarchy that arises when members of animal social groups interact, creating a ranking system.
Social rank theory provides an evolutionary paradigm that locates affiliative and ranking structures at the core of many psychological disorders. In this context, displays of submission signal to dominant individuals that subordinate group members are not a threat to their rank within the social hierarchy .
Polycythemia is defined as serum hematocrit (Hct) or hemoglobin (HgB) exceeding normal ranges expected for age and sex, typically Hct >49% in healthy adult men and >48% in women, or HgB >16.5 g/dL in men or >16.0 g/dL in women. [8] The definition is different for neonates and varies by age in children. [9] [10]
American Journal of Hematology is an academic journal devoted to the coverage of blood diseases. It has been published since 1976. The editor-in-chief is Carlo Brugnara (Harvard Medical School). [1] According to the Journal Citation Reports, the journal has a 2022 impact factor of 12.8, ranking it 7th out of 76 journals in the category ...
Hematology (spelled haematology in British English) is the branch of medicine concerned with the study of the cause, prognosis, treatment, and prevention of diseases related to blood. [ 1 ] [ 2 ] It involves treating diseases that affect the production of blood and its components, such as blood cells , hemoglobin , blood proteins , bone marrow ...
Patriarchy is a social system in which positions of authority are primarily held by men. The term patriarchy is used both in anthropology to describe a family or clan controlled by the father or eldest male or group of males, and in feminist theory to describe a broader social structure in which men as a group dominate society. [1] [2] [3]
Haemophilia A affects about 1 in 5,000–10,000, while haemophilia B affects about 1 in 40,000 males at birth. [2] [5] As haemophilia A and B are both X-linked recessive disorders, females are rarely severely affected. [8] Some females with a nonfunctional gene on one of the X chromosomes may be mildly symptomatic. [8]