So (if I am not wrong) we’re 50% our father’s DNA and 50% our mother’s DNA, but why do I look so much like my dad? What part of our DNA determines who we resemble? How does that work? Thanks!
In: 0
You have each gene twice, one copy from each parent. But in many cases one gene is stronger than the other so only one will be active. (For example brown eyes overwrite every other colour)
Wich of their two genes your parents give you is chosen randomly, so you get either your granpas or grandmas gene. That means your siblings can look different since they possibly receive the one from the other grandparent.
And that also means features can skip a generation, your parent carried the gene but for them it was overwritten by a stronger one that you didn’t get.
You have each gene twice, one copy from each parent. But in many cases one gene is stronger than the other so only one will be active. (For example brown eyes overwrite every other colour)
Wich of their two genes your parents give you is chosen randomly, so you get either your granpas or grandmas gene. That means your siblings can look different since they possibly receive the one from the other grandparent.
And that also means features can skip a generation, your parent carried the gene but for them it was overwritten by a stronger one that you didn’t get.
So DNA is made up of strings of letters, a gene codes for a thing like a protein or a characteristic like eye colour. These genes are like chapters in a chromosome book apart from the sex chromosome you have 2 of each chromosome one from each parent for each of the 23 chromosomes.
Some characteristics are determined by dominant/recessive genes so 2 parents without cystic fibrosis can have a child with CF. The gene to cause cf is called recessive meaning there has to be a copy on each chromosome if one chromosome only has the copy the characteristics will not show.
Some characteristics are more like putting a bunch of marbles from each parent in a dish and picking a handful. I believe eye colour works like this although I couldn’t tell. You how.
If we got equal DNA from each parent every child would be a copy just at a different age
You have each gene twice, one copy from each parent. But in many cases one gene is stronger than the other so only one will be active. (For example brown eyes overwrite every other colour)
Wich of their two genes your parents give you is chosen randomly, so you get either your granpas or grandmas gene. That means your siblings can look different since they possibly receive the one from the other grandparent.
And that also means features can skip a generation, your parent carried the gene but for them it was overwritten by a stronger one that you didn’t get.
So DNA is made up of strings of letters, a gene codes for a thing like a protein or a characteristic like eye colour. These genes are like chapters in a chromosome book apart from the sex chromosome you have 2 of each chromosome one from each parent for each of the 23 chromosomes.
Some characteristics are determined by dominant/recessive genes so 2 parents without cystic fibrosis can have a child with CF. The gene to cause cf is called recessive meaning there has to be a copy on each chromosome if one chromosome only has the copy the characteristics will not show.
Some characteristics are more like putting a bunch of marbles from each parent in a dish and picking a handful. I believe eye colour works like this although I couldn’t tell. You how.
If we got equal DNA from each parent every child would be a copy just at a different age
So DNA is made up of strings of letters, a gene codes for a thing like a protein or a characteristic like eye colour. These genes are like chapters in a chromosome book apart from the sex chromosome you have 2 of each chromosome one from each parent for each of the 23 chromosomes.
Some characteristics are determined by dominant/recessive genes so 2 parents without cystic fibrosis can have a child with CF. The gene to cause cf is called recessive meaning there has to be a copy on each chromosome if one chromosome only has the copy the characteristics will not show.
Some characteristics are more like putting a bunch of marbles from each parent in a dish and picking a handful. I believe eye colour works like this although I couldn’t tell. You how.
If we got equal DNA from each parent every child would be a copy just at a different age
Latest Answers