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StevePrimary nondisjunction occurs during meiosis when homologous chromosomes fail to separate, leading to abnormal chromosome numbers in daughter cells. Secondary nondisjunction happens later in development when a previously normal cell undergoes a mitotic division with faulty chromosome separation, resulting in abnormal chromosome numbers in daughter cells.
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What is the difference between primary and secondary infection?
A primary infection occurs when the body is exposed to a pathogen for the first time, while a secondary infection happens when a different pathogen infects a body already weakened by a primary infection. Primary infections may lead to the development of immunity, while secondary infections can occur in individuals with compromised immune systems.
Define the difference between primary and secondary endocrine pathology?
Primary endocrine pathology refers to dysfunction within an endocrine gland itself, causing abnormal hormone production. Secondary endocrine pathology results from dysfunction in the pituitary gland or hypothalamus, leading to inadequate stimulation or suppression of hormone production in the target endocrine gland.
What is the difference between primary an secondary sucession?
Primary succession occurs in areas that have never been inhabited before, such as a newly formed volcanic island, while secondary succession occurs in areas that have been previously inhabited, such as after a fire or human disturbance. Primary succession starts from bare rock or soil, while secondary succession occurs on existing soil with some remnants of the previous community.
What is a band of cartilage called between the primary osstification center and the secondary osstification center?
The band of cartilage between the primary and secondary ossification centers is called the epiphyseal plate or growth plate. It is responsible for longitudinal bone growth in children and adolescents.
distinguish between primary and secondary cells?
A primary cell cannot be recharged whereas a secondary cell can be recharged. In a primary cell chemical reaction is irreversible whereas in a secondary cell chemical reaction is reversible. ... A primary cell is light and less expensive whereas a secondary cell is heavy and expensive.
