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y is it more people have recessive traits compared to people having dominant traits?

2007-10-20 13:40:51 · 5 answers · asked by Anonymous in Science & Mathematics Biology

5 answers

they are not dominant. you need two copies of a recessive gene to display the feature. in a dominant gene, you only need two. google a punnet square for a visual representation. the capitals are dominant and the lower case are recessive

2007-10-20 13:46:16 · answer #1 · answered by Anonymous · 0 0

Recessive traits are not dominant over dominant traits. Here's how it works:
If one person has a dominant trait and a recessive trait, the dominant trait will always show itself and there will be no evidence that the recessive trait even exists in that person. The only time a recessive trait shows up is if it has been inherited from both parents without the dominant trait being present.

The easiest one to understand is blue eyes vs brown eyes. Brown eyes are dominant. If you inherit the gene for brown eyes from one parent and the gene for blue eyes from the other, you will always have brown eyes but will carry the recessive blue eyed gene. The only way you will have blue eyes is if you inherit the blue eyed gene from both parents. Furthermore, if you have brown eyes but also carry the ressessive blue-eyed gene that blue eyed gene can be passed on for generations with no blue eyed offspring until some decendent mates with someone else with a recessive blue eyed gene and the offspring inherits the recessive blue eyed gene from both parents.

Two blue eyed parents each have two recessive blue eyed genes and can have only blue eyed children. Brown eyed parents may or may not have a recessive blue eyed genes and may or may not have blue eyed children.

That's how recessive traits can be carried on generation after generation even if they are detrimental to health and life. That doesn't happen with dominant traits because if the are detrimental they are more likely to cause the death or non-reproduction much sooner.

2007-10-20 14:06:53 · answer #2 · answered by Joan H 6 · 0 0

That is a very complicated question. Yes research says there are more recessive traits out in the world but it depends on your genetics. Some dominate traits were just 'lost' a long time ago and only show up randomly.

2007-10-20 13:46:47 · answer #3 · answered by depressed_blue_sky 2 · 0 0

dominant/recessive refers to what happens when an individual has two different alleles for a trait, the dominant one is apparent in the phenotype. This has nothing to do with prevelance which refers to how common a trait is in the population.

2007-10-20 15:39:10 · answer #4 · answered by noone 1 · 0 0

the genotype could be the two Bb or BB, brown eyes are a dominant trait, so in case you have purely one B allele you've gotten brown eyes, you purely take place to offer particularly much less melanin for that gene, yet you've gotten one or the two between the brown genes to have brown eyes. wish this solutions your question =]

2016-11-09 01:35:30 · answer #5 · answered by ? 4 · 0 0

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