Mendelian Genetics.1 pp.Handout.2013

Father mother you fill in genotypes of all of the

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Unformatted text preview: Y-Yellow/red ON 2.  y-Yellow/red OFF pp Mutation @ Locus 2: “pied” Piebald ON 2 alleles: 1.  P-Piebald OFF 2. p-Piebald ON Dihybrid cross: autosomal w/pure dominance, Cockatiel color mutations: F1 cross of heterozygotes Q: What are the 4 haploid gamete genotypes? Father⇒ Mother⇓ YOU FILL IN GENOTYPES OF ALL OF THE GAMETES: Symbols for Yellow-Red locus: 1.  Y = yellow-red ON (normal cockatiel) 2.  y = yellow-red OFF (whiteface/gray) Symbols for Pattern locus: 1.  P = piebald pattern OFF (normal) 2.  p = piebald pattern ON (pied cockatiel) Dihybrid cross: autosomal w/pure dominance, Cockatiel color mutations: F1 cross of heterozygotes Q: What are the 4 haploid gamete genotypes? Father⇒ Mother Dihybrid cross: autosomal w/pure dominance, Cockatiel color mutations: F1 cross of heterozygotes Q: What diploid genotype is in each cell? Father⇒ Mother⇓ YP Yp yP yp YP 1: 2: 3: 4: Yp 5: 6: 7: 8: yP 9: 10: 11: 12: yp 13: 14: 15: 16: Dihybrid cross: autosomal w/pure dominance, Cockatiel color mutations: F1 cross of heterozygotes Father⇒ Mother⇓ YP YP 1:YYPP Yp Yp yP 2:YYPp phenotypes PP in each4cell?Pp 3:Yy are :Yy What A.  Normal both loci 6:YYpp.  Whiteface yPp 7:Y B 5:YYPp yP 9:YyPP C.  Pied 10:YyPp  Whiteface pied 11:yyPP D. yp 13:YyPp 14:Yypp A yp B C 15:yyPp D 8:Yypp 12:yyPp 16:yypp Dihybrid cross: autosomal w/pure dominance, Cockatiel color mutations: F1 cross of heterozygotes Q1: There are 4 phenotypes: Which cells are the normal (A) phenotype? Q2: How many different genotypes produce the “normal” phenotype? Father⇒ Mother⇓ YP YP 1:YYPP Yp 5:YYPp yP 9:YyPP yp 13:YyPp A Yp yP yp What :phenotypes are YyPP cell? :YyPp 2 YYPp 3: in each 4 A.  Normal both loci 6:YYpp 7:YyP...
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