An organism can be homozygous dominant, if it carries two copies of the same dominant allele, or homozygous recessive, if it carries two copies of the same recessive allele. … For example, pea plants can have red flowers and either be homozygous dominant (red-red), or heterozygous (red-white).
Is DD homozygous dominant?
Suppose that the GENOTYPE (the genetic makeup for this trait) of Sam is “DD”. He is HOMOZYGOUS (has 2 identical alleles for that gene) for the dimples gene. Sally’s genotype is “dd”, so she is also considered homozygous.
|t||tt (short)||tt (short)|
Is AA homozygous dominant?
Homozygous means that both copies of a gene or locus match while heterozygous means that the copies do not match. Two dominant alleles (AA) or two recessive alleles (aa) are homozygous. One dominant allele and one recessive allele (Aa) is heterozygous.
Is KK homozygous dominant?
“KK” is a homozygote for the dark green gene. Most autosomal dominant mutations are incomplete (as is this one) meaning that the heterzygote has a different phenotype (or appearance) than both the homozygous dominant form (KK) and the homozygous recessive for (kk).
Is EE homozygous dominant?
Homozygous dominant, means that the organism has two copies of the dominant allele, in this case EE. … Heterozygous means that the organism has one dominant and one recessive allele: Ee. Combination B is an example. Homozygous recessive means that an organism has two copies of the recessive allele: ee.
Can heterozygous be dominant?
If the alleles are heterozygous dominant, the faulty allele would be dominant. In such a case, the person may or may not be affected (compared to homozygous dominance where the person would be affected).
How can you tell if someone is heterozygous or homozygous?
Because an organism has two sets of chromosomes, it usually only has two options to choose from when determining phenotype. If an organism has identical genes on both chromosomes, it is said to be homozygous. If the organism has two different alleles of the gene it is said to be heterozygous.
Is nn homozygous?
TT, Tt, YY, Hh, Ll, Pp, PP, MM, Nn, Rr, Qq, QQ, qq, mm, tt. Homozygous genotypes have either all dominant alleles (all capital letters) or all recessive alleles (all lowercase letters). … They are represented by one capital and one lowercase letter. Tt, Hh, Ll, Pp, Nn, Rr, Qq.
Is BB homozygous or heterozygous?
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.