An organism is heterozygous at two different loci on different chromasomes?

a) explain how these alleles are transmitted in the process of mitosis to daughter cells


b)explain how these alleles are distributed by the process of meiosis to gametes


c)explain how the behavoir of these two pairs of homologous chromasomes during meiosis provides the physical basis for Mendel's two laws of inheritance











i was just looking for some help so you dont have to answer in full length all of them but rather help with 1 or 2 of them





please and thank you!

An organism is heterozygous at two different loci on different chromasomes?
(c) Mendels first law- the law of segregation occurs because for each characteristic, an organism inherits two alleles, one from each parent. This means that when somatic cells are produced from two alleles, one allele comes from the mother and one from the father. These alleles may be the (homozygous) different (heterozygous)





Mendels second law- the law of independent assortment occurs because the direction in which the two chromatids on one chromosome seperate have no effect on the direction the two chrmatids on the other chromosome seperate. Thus they assort independently of each other





a) IPMAT


INTERPHASE- the chromatin uncoils to form chromosome, the nucleus disintergrates


prophase- chormosome line up equater of the cell


metaphase- centromeers attach to telemeres which are on either poles of the cell


anaphase- chromosomes seperate to either poles of the cell


teleophase the chromosomes uncoil, and two new uclueases form, genetically identical in mitosis





b) the same as a) except for in anaphase the sister chromatids seperate
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Reply:Your question is very confusing...





a) Individual alleles aren't transmitted to progeny during mitosis, their chromosomes, (that contain the alleles) migrate two the daughter cells via spindle apparatus.





b) the same thing goes for meiosis. The alleles on each chromosome are intact as they migrate to each premature daughter cell.





c) This question is what you were probably trying to get at in A and B.





Crossing over only occurs in the formation of gametes (sperm and oocytes). Since gametes proliferate only from meiosis, crossing over is a phenomenon associated with such.





Crossing over is the exchange of alleles from homologues that you were talking about; it occurs in prophase 1.





Mendel's two laws are the "Law of segregation" and "Independent assortment"....





Segregation: Is basically what I said... The alleles of the two homologues have the potential to switch from one chromatid to the other as long as each one has one of the pair of alleles.





Independent Assortment: This simply says that all genes (2 alleles) will assort independently of one another.
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