What is the pseudoautosomal region? How does the inheritance of traits encoded by genes in this region differ from the inheritance of other Ylinked characteristics?

How do homeobox genes control segmental identity in drosophila embryo?

What is morphological expression of a gene called?

Which Position-effect variegation in Drosophila?

If A-P width is the most important regulator of digit number, which basic cellular mechanism would you expect to be correlated with digit number?

IS APC a inflammotry gene and how does it chromosomal instability,

Briefly explain the regulatory interactions between these three classes of patterning genes (gap, pair rule, segment polarity).  What is the temporal order of action and how do the different classes of genes regulate each other?

Why Some hypermorphic alleles encode overactiveproteins?

There are a small number of genes in which the maternal or paternal copy that an organism inherits is methylated. In one case in mice there are known mutations in the gene. If a mouse inherits a mutated gene from its mother, the mouse is normal. However, if the mouse inherits a mutated gene from its father, the mouse is much smaller than normal. Based on this information which allele is normally methylated, the paternal allele or the maternal allele? Explain your reasoning.

ow does DNA methylation occur? What enzyme is involved in DNA methylation? What are the consequences of DNA methylation? What is base flipping and why is it significant? How do bacteria use methylation to protect their own DNA? How is methylation is used to silence genes in plants and mammals? What is epigenetic silencing? How is DNA methylation involved in X-chromosome inactivation and genomic imprinting in mammals? What are boundary elements and what role do they play in separating chromatin domains? How do special DNA sites facilitate the transition between euchromatin and heterochromatin? How do boundary elements affect chromatin modification? How do boundary elements function by binding specific proteins? What are the elements required for chromosome function? List the specialized regions that direct essential chromosomal functions. How does the “origin” site initiate DNA replication? Why is a replication of linear DNA more complicated than the replication of circular DNA?