How do somatic and germ line gene therapy differ? How are alleles and traits related? Why is autosomal DNA different for siblings? How is autosomal DNA passed down? What is the difference between autosomal and mtDNA tests? Why do populations have variation in certain traits?
How are genes and alleles related to genotype and phenotype? How are alleles and traits related? How does meiosis get its diploid cell? How does recombination contribute to offspring diversity? When homologous chromosomes cross over, what is the result?
Once recombination is halted on the Y or W chromosome genes without sex-specific benefits are often pseudogenized. The non-recombining region can expand with the acquisition of additional sexually antagonistic alleles and further recombination suppression, leading to additional strata—spatial clusters of...
Traits which are transferred to next generation i.e. from from parents to offsprings are calledinherited traits. They are transferred during reproduction. In case of TT or tt , RRYY or rryy, T represents one allele and t other allele of a gene controlling particular trait. Alleles are...
Stabilising selection can maintain many traits close to their optima, even when the underlying alleles are weakly selected. However, the number of traits that can be optimised is apparently limited to ~ 4Ne by the 'drift load', and this is hard to reconcile with the apparent complexity of ...
Sometimes, a change in the variation of genetic traits occurs in a population. These different variations of genes which express different traits are calledalleles. Changes in the frequency of alleles are known asgenetic drift. When genetic drift occurs, the number of individuals with a certain tr...
The researchers found adaptive alleles related to development were unique to the multiple stressor experiment, providing a possible explanation for the observed selection of hatching success. “We showed that the warming alone was a much strong er selective pressure than CO₂. But when you combine...
Describe two different ways in which a change in the DNA sequence could lead to the development of a constitutive mutant and how the two constitutive mutants are distinguished genetically. 1. Why is it possible for bacterial cells to obtain...
And short plants may be earlier than tall ones, or less subject to lodging (falling over) in the rain or wind. They also may have a higher proportion of grain to the rest of the plant. So shorter plants can be advantageous as cultivated crops. Specific mutations or alleles are not good...
How do alleles determine the expression of traits? How are autosomal traits related to Mendel's observations of heredity? If a single gene controls the mutant type, how will you determine which is the dominant and which is the recessive?