In animals sexual reproduction involves combining haploid nuclei from one egg and one sperm to gene Show more In animals sexual reproduction involves combining haploid nuclei from one egg and one sperm to generate a diploid zygote.
In contrast parthenogenesis involves the generation of offspring from an unfertilized egg. Individuals generated by parthenogenesis have a single parent. These offspring carry only halfthe genetic complement of that parent since part of the process of parthenogenesis involves generating two identical copies of each of the chromosomes present in the haploid egg. Q1. From the point of view of gene variability and the adaptability of the population what potential disadvantage might be associated with animals generated by parthenogenesis? Q2. While parthenogenesis has been described in many animal species including bees fish birds and lizards it appears to be absent from mammalian species. However in 2003 scientists from Tokyo and Seoul reported the successful generation of a mouse by parthenogenesis. The mouse has a similar immune system to that of humans (as discussed in class). Also as in humans there is considerable variability in MHC proteins (and their corresponding genes) between different mice. How then might the capacity to generate mice by parthenogenesis influence our ability to match tissues for organ transplantation in mice? Show less
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