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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.
In maternal effect genes, the RNA or protein from the mother’s gene is deposited into the oocyte or embryo before the embryo can express its own zygotic genes. Hunchback is a morphogen, meaning the concentration gradient of Hunchback at a specific region determines the segment or body part it develops into.
The maternal effect genes are responsible for the polarity of the egg and of the embryo. The developing egg ( oocyte ) is polarized by differentially localized mRNA molecules. The genes that code for these mRNAs, called maternal effect genes , encode for proteins that get translated upon fertilization to establish concentration gradients that ...
Some of the earliest examples of parent-offspring conflict were seen in bird broods and especially in raptor species. While parent birds often lay two eggs and attempt to raise two or more young, the strongest fledgling takes a greater share of the food brought by parents and will often kill the weaker sibling ().
SPOILERS BELOW—do not scroll any further if you don't want the answer revealed. The New York Times. Today's Wordle Answer for #1275 on Sunday, December 15, 2024.
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 FBI identified Shamsud Din Jabbar of Texas as the suspected truck driver who crashed into a New Year's Eve crowd at high speed in New Orleans.
Country superstar Lainey Wilson revealed she's patiently waiting for a proposal from her boyfriend, former NFL quarterback Devlin "Duck" Hodges.