Biology 1001A Lecture Notes - Lecture 17: Genomic Imprinting, Sexual Conflict, Fetus

7 views2 pages
8 May 2016
Department
Professor

Document Summary

Bio 1001a - lecture 17 cooperation and conflict 2. Genetic conflict can arise early in individual"s life: ex. Mother has to divide resources between all offspring. Fetus wants as much as possible, not as related to future offspring. Parent-offspring conflict more pronounced in promiscuous species than monogamous species: degree of relatedness between half-siblings less than relatedness between full siblings, offspring in promiscuous mating system more demanding of maternal resources. Around 1% of genes in mammals have only one allele expressed (either maternal, paternal) Most of these genes regulate embryonic growth (rest are expressed in brain) Loci with only maternal expression downregulate growth. Loci with only paternal expression upregulate growth. Sexual conflict hypothesis: which parent"s allele is silenced (imprinted) and which is expressed reflects conflicting interests of maternally vs paternally derived alleles, both alleles have different genetic interests. Female"s future offspring will probably have different father. Places different selective forces on paternal and maternal alleles.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents