Uploaded March 2025 | Updated September 2026, 1 day ago
In this video, we look at sex-linked genes. First we explore the sex chromosomes in males and females. We then explore what is meant by a sex-linked gene, using colour-blindness and haemophilia as examples. We carry out two genetic crosses showing how haemophilia is inherited and explain why sex-linked conditions are more common in men than women.
Image credits:
Human male karyotype
commons.wikimedia.org/wiki/File:Human_male_karyotype.gif
Courtesy: National Human Genome Research Institute, Public domain, via Wikimedia Commons
Haemophilia
commons.wikimedia.org/wiki/File:A_woman_suffering_from_Hemophilia.png
myupchar.com/en, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons
In this video, we look at sex-linked genes. First we explore the sex chromosomes in males and females. We then explore what is meant by a sex-linked gene, using colour-blindness and haemophilia as examples. We carry out two genetic crosses showing how haemophilia is inherited and explain why sex-linked conditions are more common in men than women.
Image credits:
Human male karyotype
commons.wikimedia.org/wiki/File:Human_male_karyotype.gif
Courtesy: National Human Genome Research Institute, Public domain, via Wikimedia Commons
Haemophilia
commons.wikimedia.org/wiki/File:A_woman_suffering_from_Hemophilia.png
myupchar.com/en, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons
