Different alleles produce variation in inherited characteristics such as hair colour or blood type. In an individual, one form of the allele (the dominant form) may be expressed more than another form (the recessive form). Continue reading
Humans are born with five basic senses—hearing, sight, smell, taste and touch. In this activity, students perform tests to determine the acuity of each of these senses. Continue reading
Human bodies aren’t built for extreme aging: our capacity is set at about 90 years. But what does aging really mean, and how does it counteract the body’s efforts to stay alive? Monica Menesini details the nine physiological traits that play a central role in aging.
Lesson by Monica Menesini, animation by Cinematic.
View full lesson: http://ed.ted.com/lessons/why-do-our-…
What is the balance between heredity and environment in determining what an organism will look like? Continue reading
Scientists have created living bacteria with two extra letters of genetic code, nicknamed X, and Y for short. Continue reading
Jade and Lauren want to know if it’s genetically possible to grow wings on your back and fly. Find out from MIT biologist, Dr. Sera Thornton! Continue reading
Geneticist Jennifer Doudna co-invented a groundbreaking new technology for editing genes, called CRISPR-Cas9. The tool allows scientists to make precise edits to DNA strands, which could lead to treatments for genetic diseases … but could also be used to create so-called “designer babies.” Doudna reviews how CRISPR-Cas9 works — and asks the scientific community to pause and discuss the ethics of this new tool.
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We went to the U.S. Patent & Trademark Office to get the lowdown on the CRISPR gene-editing patent dispute. Continue reading