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In medical genetics, compound heterozygosity is the condition of having two or more heterogeneous recessive alleles at a particular locus that can cause genetic disease in a heterozygous state; that is, an organism is a compound heterozygote when it has two recessive alleles for the same gene, but with those two alleles being different from each other (for example, both alleles might be ...
MHC-based sexual selection is known to involve olfactory mechanisms in such vertebrate taxa as fish, mice, humans, primates, birds, and reptiles. [1] At its simplest level, humans have long been acquainted with the sense of olfaction for its use in determining the pleasantness or the unpleasantness of one's resources, food, etc.
People who have hemoglobin E trait (heterozygous) are asymptomatic and their state does not usually result in health problems. They may have a low mean corpuscular volume (MCV) and very abnormal red blood cells (target cells), but clinical relevance is mainly due to the potential for transmitting E or β-thalassemia. [4]
1. Tyagi S, Marwaha N, Parmar V, Basu S. Sickle cell hemoglobin-D Punjab disease (Compound Heterozygous state). Ind J Hematol Blood Transf 2000;18:31-2. 2. Zeng YT, Huang SZ, Ren ZR, Li HJ (1989). "Identification of Hb D-Punjab gene: application of DNA amplification in the study of abnormal hemoglobins". Am. J. Hum. Genet. 44 (6): 886– 9. PMC ...
The differences were more pronounced with alleles represented as functional supertypes (P = 1.05 × 10 −6) than those represented as low-resolution genotypes (P = 1.99 × 10 −3). These findings constitute evidence that heterozygosity provides an advantage among carriers of different supertype HLA-DRB1 alleles against HCV infection ...
A transheterozygote is a diploid organism that is heterozygous at two different loci (genes). Each of the two loci has one natural (or wild type) allele and one allele that differs from the natural allele because of a mutation. Such an organism can be created by crossing together two organisms that carry one mutation each, in two different ...
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In humans, these regions are referred to as PAR1 and PAR2. [4] PAR1 comprises 2.6 Mbp of the short-arm tips of both X and Y chromosomes in humans and great apes (X and Y are 154 Mbp and 62 Mbp in total). PAR2 is at the tips of the long arms, spanning 320 kbp. [5]