BIO$2110$–$Genetics$ Name$______________________________$Recitation$5$–$Meiotic$Segregation$of$Allelic$Variants$$Group$Members$_____________________________$$$$$_________________________$$$$$__________________________$$$1.$ Shown$below$is$a$diagram$of$a$cell$in$prophase$I$of$meiosis.$$One$pair$of$homologous$chromosomes$is$shown.$$These$chromosomes$vary$at$one$gene,$which$has$a$dominant$‘A’$allele$on$one$chromosome$and$a$recessive$‘a’$allele$on$the$other$chromosome.$$What$gamete$genotypes$would$be$derived$from$this$cell?$$What$would$be$the$frequencies$of$these$gamete$genotypes?$$$$$$ $aaAA2.$ Shown$below$is$a$diagram$of$a$cell$in$prophase$I$of$meiosis.$$Two$pairs$of$homologous$chromosomes$are$shown$that$each$vary$at$one$gene.$$One$chromosome$is$heterozygous$for$the$dominant$‘A’$allele$and$the$recessive$‘a’$allele.$$The$other$chromosome$is$heterozygous$for$the$dominant$‘B’$allele$and$the$recessive$‘b’$allele.$$What$gamete$genotypes$would$be$derived$from$this$cell?$$What$would$be$the$frequencies$of$these$gamete$genotypes?$$$$$$ $bBbBaaAA3.$ Shown$below$is$a$diagram$of$a$cell$in$prophase$I$of$meiosis.$$One$pair$of$homologous$chromosomes$is$shown.$$These$chromosomes$each$vary$at$two$genes,$being$heterozygous$for$the$dominant$‘A’$allele$and$the$recessive$‘a’$allele$and$heterozygous$for$the$dominant$‘E’$allele$and$the$recessive$‘e’$allele.$$Recombination$occurs$between$these$genes$in$20%$of$meioses.$$What$gamete$genotypes$would$be$derived$from$this$cell?$$What$would$be$the$frequencies$of$these$gamete$genotypes?$$$ $aaAAeEEeaaAAeEEeaaAAeEEe80%$no$recombination20%$recombination4.$ Shown$below$is$a$diagram$of$a$cell$in$prophase$I$of$meiosis.$$One$pair$of$homologous$chromosomes$is$shown.$$These$chromosomes$each$vary$at$two$genes,$being$heterozygous$for$the$dominant$‘A’$allele$and$the$recessive$‘a’$allele$and$heterozygous$for$the$dominant$‘E’$allele$and$the$recessive$‘e’$allele.$$Recombination$occurs$between$these$genes$in$20%$of$meioses.$$What$gamete$genotypes$would$be$derived$from$this$cell?$$What$would$be$the$frequencies$of$these$gamete$genotypes?$$Are$the$frequencies$of$gamete$genotypes$obtained$here$the$same$as$the$frequencies$obtained$in$question$3?$$If$not,$why$not?$$$ $aaAAEEeeaaAAEEeeaaAAeEEe80%$no$recombination20%$recombination5.$
View Full Document
Unlocking...