dominant alleles will always overrule recessive alleles. So if you have any dominant allele in the phnotype or geneotype, the dominant trait will be expressed. For example, since black fur is dominant to brown fur on mice, if two black mice mate, at least part of their offspring will have black fur. If they are heterozygous for black, though, that's when a brown mouse offspring may be possible, but there would always be more black offspring than brown offspring. parents offspring (4) Bb x Bb --> BB, Bb, Bb, bb BB x Bb --> BB, BB, Bb, Bb BB x BB --> BB, BB, BB, BB BB x bb --> Bb, Bb, Bb, Bb Bb x bb --> Bb, Bb, bb, bb anything with a capital B would be black while "bb" is the only brown.
Dominant: dark hair, curly hair, detached earlobes
Recessive: red hair, albinism
There are infinite examples. :3
NOTE: Not sure about the hair stuff, and there are much better examples, though at least albinism is well known. Contrary to popular belief and what Hugh Laurie says on House eye colour is a complex trait, like height.
In pea plants, tall height is dominant and short height is recessive. The tall allele is represented with a capital T, while the short allele is represented by a lowercase t. The genotype TT represents the homozygous dominant condition, while Tt represents the heterozygous condition. Both TT and Tt will produce the tall phenotype. The tt genotype represents the homozygous recessive condition and will produce the short phenotype.
An example of a dominant allele being expressed is when a human has free earlobes, rather than attached earlobes (a recessive trait).
blue eyes
blonde hair
etc..
brown eyes and brown hair are dominant
Dominant alleles are shown by a capital letter and recessive alleles are lowercase letters.
Dominant alleles :-)
I am pretty sure the recessive and dominant alleles you are talking about are covered in Biology. Recessive alleles are basically alleles that are received from both parent's DNA that are carries, (dd). However, dominant alleles are (exactly what it says) always expressed. If there is one dominant allele and one recessive allele the dominant allele overpowers the recessive. (DD) and (Dd)overpowers (dd).
A punnet square uses letters to represent dominant and recessive alleles.
In eyes, it would be brown is dominant, and blue is recessive. Free earlobe allele is said to be dominant over the attached earlobe allele. When an organism has two dominant alleles for a trait, it is called homozygous dominant. Two recessive alleles for a trait is homozygous recessive.
Alleles can be dominant or recessive
Dominant alleles are shown by a capital letter and recessive alleles are lowercase letters.
Dominant alleles are shown by a capital letter and recessive alleles are lowercase letters.
A gene pair that consists of 2 dominant or 2 recessive alleles is considered homozygous dominant or homozygous recessive.
Dominant alleles :-)
Dominant alleles are written in upper case (i.e, 'A'), while recessive alleles are lower case (i.e, 'a')
You need two recessive alleles to get their trait, but only one dominant allele to get that trait. A dominant allele basically overrides a recessive one if they are together, but the recessive gene can show up in offspring.
Dominant alleles are shown by a capital letter and recessive alleles are lowercase letters.
Dominant alleles are the ones that show up in the phenotype. Recessive alleles do not unless both alleles are recessive, but can be passed on. For example: Tt , T=tall and t=short. Tall is dominant and short is recessive. You are tall and can pass on the short gene. Or, you can use black hair being dominant over red. Or, brown eyes being dominant over blue. Dominant can be seen on you and recessive can't.
I am pretty sure the recessive and dominant alleles you are talking about are covered in Biology. Recessive alleles are basically alleles that are received from both parent's DNA that are carries, (dd). However, dominant alleles are (exactly what it says) always expressed. If there is one dominant allele and one recessive allele the dominant allele overpowers the recessive. (DD) and (Dd)overpowers (dd).
A dominant alle masks the expression of the recessive trait in a heterozygous genotype, a recessive allele is the phenotpye expressed is the recessive trait.
If you have 2 dominant alleles, the gene will be dominant, if you have 2 recessive alleles, the gene will be recessive. But if you have 1 recessive and 1 dominant, the Dominant allele will mask the recessive one.