AP BIOLOGY

HEREDITY

MULTIPLE ALLELES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Shows this specific trait even if only one parent carries it
A
recessive
B
homozygous
C
dominant
D
heterozygous
Explanation: 

Detailed explanation-1: -Dominant alleles show their effect even if the individual only has one copy of the allele (also known as being heterozygous?). For example, the allele for brown eyes is dominant, therefore you only need one copy of the ‘brown eye’ allele to have brown eyes (although, with two copies you will still have brown eyes).

Detailed explanation-2: -If a gene version is dominant, it will dominate whether it came from mom or dad. Your chances of getting a dominant trait don’t depend on which parent it came from. If mom gives you a dominant brown eye version of an eye color gene, odds are you’ll end up with brown eyes. Same thing if dad passes the same gene.

Detailed explanation-3: -Examples of Dominant Traits Dark hair is dominant over blonde or red hair. Curly hair is dominant over straight hair. Baldness is a dominant trait. Having a widow’s peak (a V-shaped hairline) is dominant over having a straight hairline.

Detailed explanation-4: -Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent. If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.

Detailed explanation-5: -They may even think they act more like one than the other. And while it is true that you get half of your genes from each parent, the genes from your father are more dominant, especially when it comes to your health.

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