Answer:
Huntington disease is a dominant autosomic disease so it presents either in heterozygosity (Aa) or in homofzigosity (AA)
observing the pedigree, the two parents have the Aa genotype so by making the punnet's square we have as possible genotypes: AA, Aa, Aa, aa. So the chance to get the disease is 25%
Please ask a school question next time please.
Answer:
Adding or removing thermal energy
Answer: https://screenshare.host/26OGVD
Explanation: my thing is messed up but thats the answer