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In genetics, a maternal effect occurs when the phenotype of an organism is determined by the genotype of its mother. [1] For example, if a mutation is maternal effect recessive, then a female homozygous for the mutation may appear phenotypically normal, however her offspring will show the mutant phenotype, even if they are heterozygous for the mutation.
Seema Jayachandran's research focuses on health, development economics, and environmental economics. [7] Her research has been acknowledged through several awards, including a Sloan Research Fellowship in 2011, [8] an NSF CAREER Award in 2011, [9] and the Sustainability Science Award from the Ecological Society of America in 2018.
Maternal effect dominant embryonic arrest (Medea) is a selfish gene composed of a toxin and an antidote. A mother carrying Medea will express the toxin in her germline, killing her progeny. If the children also carry Medea , they produce copies of the antidote, saving their lives.
Types of parental care include maternal or paternal care, biparental care and alloparental care. [1] Sexual conflict is known to occur over mating, and further familial conflicts may continue after mating when there is parental care of the eggs or young. For example, conflict may arise between male and female parents over how much care each ...
The motherhood penalty refers to the economic disadvantages women face in the workplace as a result of becoming mothers. [1] [2] [3] This sociological concept highlights how working mothers often experience wage reductions, diminished perceived competence, and fewer career advancement opportunities compared to their childless counterparts.
The data indicated a widening disparity in black-white infant mortality as maternal ages increase. Subsequently, Geronimus proposed the "weathering hypothesis", which she initially conceived as a potential explanation for the patterns of racial variation in infant mortality with increasing maternal age. [11]
1. These are commonly found in myths, legends and stories. 2. These are used to sort/organize digital messages. 3. Fizzy beverages with a sharp, zesty taste. 4. The words in this category sound ...
Sexual selection is an evolutionary concept that has been used to explain why, in some species, male and female individuals behave differently in selecting mates. In 1930, Ronald Fisher wrote The Genetical Theory of Natural Selection, [3] in which he introduced the modern concept of parental investment, introduced the sexy son hypothesis, and introduced Fisher's principle.