In genetic maternal effect, the phenotype of the individual is determined by which of these statements? A. The sex of the parent who transmits the gene B. The nuclear genotype of the maternal parent C. The sex of the individual with only one sex able to express the phenotype D. Cytoplasmic genes usually located in the mitochondria E. A combination of environmental factors and the genotype of the individual

a.describe the main features of the cell cycle. b. explain features of primary and secondary cell cultures. c. describe how to produce monoclonal antibodies to HIV-gp 120 for commercial use.

There is a protein called neurogenin that stimulates neuronal cells to differentiate. In order to determine what kind of receptor neurogenin binds to, you add a general phosphatase (one that can remove phosphates from any substrate) to neural cells when you add neurogenin, and you discover that this inhibits differentiation. Furthermore, in the presence of this phosphatase, you find that not even a G protein is activated in response to neurogenin. 1.  With this information, what kind of receptor does neurogenin bind to? 2.  In a normal cell, how does the G protein in this pathway get activated? 3.  In a normal cell, why does the response to neurogenin cease over time?

If two mutational events are sufficient to cause some forms of cancer, what distinguishes familial forms (i.e. those that "run in families") of cancer from spontaneous cases?   A. spontaneous forms inherit both mutations   B. familial forms are caused by chance alone   C. familial forms inherit one mutation   D. there is no difference   E. none of the above

Which of the following statements about calico cats is true? Select all that apply.

This is a chromosomal disorder resulting from the non-disjunction of chromosome 21 during anaphase that gives an extra copy of the chromosome to the person who has inherited it.

Please answer all of these questions

Distinguish between mutations in somatic cells versus in germ cells.

The idea that sperm carry more mutations thanoocytes makes sense. Explain how?

In marsupials, X inactivation occurs exclusively to paternally derived chromosomes. Which genes will ALWAYS be expressed in this situation? A. maternal X-linked genes B. paternal X-linked genes C. maternal Y-linked genes D. paternal Y-linked genes