How is a gene determined to be autosomal recessive? What is the difference between a dominant allele and a recessive allele? What makes an allele dominant, recessive, or codominant? How does gene flow homogenize allele frequencies? If the frequency of the HbS allele is 0.1 in a population, ...
If each gene is located on a specific chromosome and that chromosome has two pairs (homologous chromosomes), how does each chromosome represent one allele and why do you label each chromatid with the same allele? What pattern of inheritance do the traits in each of the...
Let's go back to our fruit fly example. Let's say there are 20 alleles at locus 1, and one of those alleles causes a particular disease when a fly has two copies of that allele (homozygous). Because there are 20 total alleles, the probability of a fly getting two copies of that ...
Dominant traits mask or hide recessive traits, meaning that while a person may inherit two different alleles for a trait, the phenotype or physical expression of the trait will be for the dominant allele. In the case of brown and blue eye color alleles, the brown eye allele is dominant over...
allele frequency, and any change in allele frequencies will generate additive variance. In addition, balancing selection is likely to act on a small number of loci with relatively large effect that would be rapidly fixed by strong directional selection (an exception is where recessive lethals ...
The common feature that defines a DEG is its ability to be copied from one chromosome to another such that a ‘heterozygote’ (a diploid individual with the gene on one but not the other chromosome) becomes a ‘homozygote’. It does this by coding for an endonuclease that causes a double...
However this model is overly simplifying since it does not consider the effects of drift. A survey of the temporal variation in allele frequencies in this population has shown that genetic drift is not too strong (NeB150, Siol et al., 2007). Further empirical studies are however needed in ...
Human precursor-U8 (pre-U8) containing a 3′ extension rescued mutant U8 zebrafish, and this result indicates conserved biological function. Analysis of LCC-associated U8 mutations in zebrafish revealed that one null and one functional allele contribute to LCC. We show that mutations in three ...
Does the phenotype frequency in a population change after each generation? Why is the frequency of the occurrence of heterozygous genotype 2pq? Statistically, it should be pq, since the possibility that an organism has a dominant allele and a recessive allele is p (the freq How is our autosom...
How is a recessive allele different from a dominant allele? What is the difference between genotype and phenotype? How do these two terms relate to the terms allele, homozygous, heterozygous, dominant, and recessive? How do you graph to represent the distribution of traits? (inheri...