I wanted to ask a question to clarify some simple concepts. We always hear that we have two copies of every gene (one from father and another from mother). When we say that, do we mean the 5-3 strand and 3-5 strand double stranded DNA? Or do we mean that there are actually two copies of the gene, each having its own 5-3 strand and 3-5 strand?
Amazintg video thanks! Is there a particular convention when putting different genotypes into the table? For example in the colourblindness Q you've put the recessive X^r in the first column. Intuitively, I'd have probably added it to the second? Thanks!
i think colourblindness will be X^r X^r, since colourblindness is a recessive allele. X^R X^r will mean that the mother is a carrier of colour blindness, but she herself will not be colour blind.
Hi Leah, I've had lots of request for videos this week, so I've decided that for the next two weeks instead of having a topic theme it is going to be subscribers choice fortnight. I'll add epigenetics and how this can lead to cancer to the list :)
hi miss, how did you get the 12.5% for the percentage for a girl. I did 0.25 x 0.5 and that gave me 0.125. 25 x 50 is 1250. so how do I get that to 12.5% :)
Hello, It was 25% probability for the condition and 50% for a girl. Half of 25 is 12.5% 0.125 is correct, but that's not as a percentage. Multiple by 100 to become percentage. Hope that helps 😊
also do you still have your topic questions on your website, the ones where there were questions for each of the subtopics in a topic if that makes sense aha
Hello Afraid not. Those didn't make the new site for a number of reasons. The main one being they had to many old spec questions and missing answers, both kept causing confusion
Homo means Same, this means the 2 if the same allele, hero means different, so there are different alleles. Like RR would be homozygous and Rr would be heterozygous
