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Title: Which do you think are likely to be multifactorial traits with phenotypes that a Post by: gon on Sep 30, 2014 Which do you think are likely to be multifactorial traits with phenotypes that are influenced by genes and environment? having trouble with this question on mastering genetics
Title: Re: Which do you think are likely to be multifactorial traits with phenotypes that a Post by: padre on Sep 30, 2014 1.Check off:
body weight in chickens fruit weight in tomatoes growth rate of sheep, milk production in cattle 2. Only 2 of the 4 gametes will be abnormal due to the nondisjunction. 3. Nutrition and nutrient sources (these make the most sense to me, because they have to cover what I mentioned in number 1). Hope this helps! Title: Re: Which do you think are likely to be multifactorial traits with phenotypes that a Post by: llijjill on Sep 30, 2014 B cell co-receptors
The specific B-cell receptor (BCR, an immunoglubulin molecule attached to the membrane of the B cell) recognises the antigen in native form, as opposed to the TCR that recognises antigenic peptides. Costimulation of B cells is notably achieved by the molecule CD40. CD40 ligand is expressed on T cells. As B cells can also present peptides to T cells, there is a dialogue between T- and B cells that allows continuous B-cell proliferation and optimal activation leading to their differentiation into plasmocytes, which are mature B cells producing high affinity antibodies against the original antigen. |