The link to get the BIOLOGY LABS is here. But I have experienced that some labs are unavailable due to YouTube’s filtering settings. You may have to try viewing the labs on your parents’ work computer or the school office computer and see if the lab plays there.
The videos below were actually made for the 3rd edition and may not be applicable for 4th edition, though the explanations for 1107 might be helpful. AND there’s a free download about human genetics 😉
Pace 1102 - Lesson to help memorize Photosynthesis equation
Pace 1105 - Diagram of the Heart
Pace 1107 - Genetics
Here’s a great article that shows simple dominant-recessive traits with people (like tongue-rolling, attached ear lobes, etc). Get the Human Genetics Article here.
PACE 1107 - Punnett Squares
PACE 1107 - Sex Chromosomes
Funny story . . . when I recorded this video, I named it “gender” chromosomes instead of “sex” chromosomes to avoid unwanted clicks. Little did I know how that term “gender” would be hijacked and redefined, and actually attract attention to this video. Of all my videos, this one has had the most traffic by far! haha!