Which blood type can be homozygous dominant?
Thus, if one parent is homozygous for type A blood and the other is homozygous for type B, the offspring will have a new phenotype, type AB. In people with type AB blood, both A and B proteins are expressed on the surface of red blood cells equally.
|Blood Type||Related Genotype(s)|
Is BB heterozygous dominant?
An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB. An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. In our example, this genotype is written Bb.
Which blood type is dominant?
ABO Blood Type
The A and B genes are dominant and the O gene is recessive. For example, if an O gene is paired with an A gene, the blood type will be A.
What is an example of homozygous dominant?
A homozygous dominant genotype is one in which both alleles are dominant. For example, in pea plants, height is governed by a single gene with two alleles, in which the tall allele (T) is dominant and the short allele (t) is recessive.
What if mother is Rh+ and baby is Rh?
If a woman who is sensitized is carrying an Rh+ baby, her antibodies to the Rh factor can cross the placenta and attack the baby’s red blood cells. This causes hemolytic disease due to Rh incompatibility. It is an anemia that can cause serious complications in the infant, including brain damage and even death.
What is heterozygous dominant example?
Heterozygous means that an organism has two different alleles of a gene. For example, pea plants can have red flowers and either be homozygous dominant (red-red), or heterozygous (red-white). If they have white flowers, then they are homozygous recessive (white-white). Carriers are always heterozygous.
What is heterozygous in genetics?
Listen to pronunciation. (HEH-teh-roh-ZY-gus JEE-noh-tipe) The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote).
Is GREY eyes dominant or recessive?
Are gray eyes recessive or dominant? Gray eyes are neither recessive nor dominant. Scientists used to think that a person’s eye color was caused by one dominant gene, and that brown eyes were dominant while lighter eyes (blue, green, hazel and gray) were recessive.
Is green or blue eyes dominant?
The allele genes come in the form of brown, blue, or green, with brown being dominant, followed by green, and blue being the least dominant or what is called recessive. Given this information, you can determine what eye colors are dominant in the parents.
Is blonde or brown hair dominant?
For hair color, the theory goes: Each parent carries two alleles (gene variants) for hair color. Blonde hair is a recessive gene and brown hair is a dominant gene.