The Spectator’s Post

Kicking off with a pair of cuddly male penguins, your host, Dr. Kaylee Byers, and guest, Dr. Julia Monk, deep dive into what our genes can tell us about sexuality and identity in this episode of Nice Genes! from Genome British Columbia. Listen here: https://lnkd.in/gQ3Pjpq4 #SciencePodcast #LoveIsLove #QueerNature

Growth, sex expression, pollen germination and yield in pepper as affected by chlorflurenol https://lnkd.in/g-SKDiDc

New Primate Chromosome Maps Shed Light on Human Evolution The complete sequence and comparative analysis of ape sex chromosomes The Y chromosome exhibits dynamic evolution, whereas the X chromosome is more stable. https://lnkd.in/ggiW4sys

Sexual Reproduction and the Evolution of Sexhttps://lnkd.in/eg54j8xY do it, and bees do it. Indeed, researchers estimate that over 99.9% of eukaryotes reproduce sexually. What, then, are the true costs and benefits of sex? By Sarah P. Otto, Scitable, 08/18/2023 Birds do it, and bees do it. Indeed, researchers estimate that over 99.99% of eukaryotes do it, meaning that these organisms reproduce sexually, at least on occasion. But why is sexual reproduction so commonplace? People typically employ several arguments in their efforts to explain the prevalence of sexual reproduction. One such argument is that organisms engage in sex because it is pleasurable. However, from an evolutionary perspective, this explanation arrived only […]

Arctic Casanovas: Male pectoral sandpipers go to extremes for their chances of mating – they almost completely forgo sleep and travel thousands of kilometers to meet females. In a long-term field study, a team lead by Bart Kempenaers investigated the sex differences between male and female sandpipers and came to astonishing results: Males have an exceptionally high proportion of red blood cells. This sex difference in hematocrit levels is more than twice as high as any previously described. These results suggest that the extreme efforts in mate search leads to an extraordinary physiology of the males, highlighting a connection between sexual selection and physiology. Scientific publication: https://lnkd.in/dB3VUr-T 📸 Photo by Katharina Kapetanopoulos #MaxPlanck #ResearchNews #Ornithology #SexualSelection

📆 13 June - International Albinism Awareness Day Today, we mark a decade since the inception of International Albinism Awareness Day with the theme "10 years of IAAD: A decade of collective progress." This day is a celebration of the strides made in advocating for the #rights and #wellbeing of #people with #albinism. It highlights the tireless efforts of #albinismgroups worldwide and emphasizes the continued need for #legal, #policy, and practical #changes to ensure full and equal enjoyment of rights. Albinism is a non-contagious, genetically inherited condition affecting people globally. It results in a lack of #melanin, making individuals #vulnerable to the #sun and #brightlight, leading to visual impairments and a higher risk of #skincancer. Despite these challenges, progress over the past decade inspires a renewed commitment to achieving full #inclusion and #protection for persons with albinism. To learn more about International Albinism Awareness Day, feel free to visit: https://lnkd.in/euBARaT 

Sex determination in birds The sex chromosomes in birds are designated Z and W, and the male is the homomorphic sex (ZZ) and the female heteromorphic (ZW). In most avian species the Z chromosome is a large chromosome, usually the fourth or fifth largest, and it contains almost all the known sex-linked genes. Youtube video: https://lnkd.in/dsuTarGZ #nikolaysgeneticslessons

Why is the Y sex chromosome so unevenly matched with its X counterpart? Why is it continually shrinking? Will it ever disappear entirely? My new article, published by the Paradox Institute, tackles these questions and more regarding the evolution of sex determination systems. It has been a pleasure to collaborate with this independent science education group. Rather than obfuscating and silencing the increasingly controversial discussions surrounding the biology of sex, the Paradox Institute uses research to empower everyone to engage in these conversations. You can find my article here: https://lnkd.in/e83sK6zE #ScienceCommunication

Female Genital Mutilation in 21st century 😳😳🙄 What are your thoughts? According to @unwomen , as at today, nearly 4.4 million girls are at risk of female genital mutilation around the world. #femalegenitalmutilation is an abuse of human right and should be abolished. Today, 6th of February, we join the @unitednations and the rest of the world to raise awareness and declare a #zerotolerancetofgm Empowered Sapiens Mulier Initiative ESMI #nongovernmentalorganization #unitednationscelebration #femalegenitalmutilation #womenempoweringwomenandgirls #womenempowermentorganization

ZW sex-determination system The ZW sex-determination system is a chromosomal system that determines the sex of offspring in birds, some fish and crustaceans such as the giant river prawn, some insects \(including butterflies and moths\), the schistosome family of flatworms, and some reptiles, e.g. majority of snakes, lacertid lizards and monitors including Komodo dragons. It is also used in some plants where it has probably evolved independently on several occasions. The letters Z and W are used to distinguish this system from the XY sex-determination system. In this system, females have a pair of dissimilar ZW chromosomes, and males have two similar ZZ chromosomes. In contrast to the XY sex-determination system and the X0 sex-determination system, where the sperm determines the sex, in the ZW system, the ovum determines the sex of the offspring. Males are the homogametic sex \(ZZ\), while females are the heterogametic sex \(ZW\). The Z chromosome is larger and has more genes, like the X chromosome in the XY system. Question: In chickens, congenital baldness is a Z linked recessive trait. A bold rooster is mated with a normal hen. The F1 from this cross are interbred to produce the F2. Give the genotypes and phenotypes and proportions among the F1 and F2 progeny. Youtube video: https://lnkd.in/dMA9w7Nk \#nikolays_genetics_lessons