Answer:
Explanation:
Cross : ggCuCu X GGcucu --------Parents
F1 progeny : GgCucu
Two of the F1 cats mate :
Cross : GgCucu X GgCucu
Gametes :
Gg X Gg = GG, Gg, Gg, gg
Cucu X Cucu = CuCu, Cucu, Cucu, cucu
1/4 GG X 1/4 CuCu = 1/16 GGCuCu (black - curled ears)
1/4 GG X 2/4 Cucu = 2/16 GGCucu (black - curled ears)
1/4 GG X 1/4 cucu = 1/16 GGcucu (black - normal ears)
2/4 Gg X 1/4 CuCu = 2/16 GgCuCu (black - curled ears)
2/4 Gg X 2/4 Cucu = 4/16 GgCucu (black - curled ears)
2/4 Gg X 1/4 cucu = 2/16 Ggcucu (black - normal ears)
1/4 gg X 1/4 CuCu = 1/16 ggCuCu (gray - curled ears)
1/4 gg X 2/4 Cucu = 2/16 ggCucu (gray - curled ears)
1/4 gg X 1/4 cucu = 1/16 ggcucu (gray - normal ears)
Answer : (i). 9/16 black cats, curled ears; 3/16 black cats, normal ears; 3/16 gray cats, curled ears; and 1/16 gray cats, normal ears.
An F1 cat mates with a stray cat that is gray and possesses normal ears :
Cross : GgCucu X ggcucu
Gametes :
Gg X gg = Gg, Gg, gg, gg
Cucu X cucu = Cucu, Cucu, cucu, cucu
2/4 Gg X 2/4 Cucu = 4/16 GgCucu (black - curled ears)
2/4 Gg X 2/4 cucu = 4/16 Ggcucu (black - normal ears)
2/4 gg X 2/4 Cucu = 4/16 ggCucu (gray - curled ears)
2/4 gg X 2/4 cucu = 4/16 ggcucu (gray - normal ears)
Answer : (i). 1/4 black cats, curled ears; 1/4 black cats, normal ears; 1/4 gray cats, curled ears; 1/4 gray cats, normal ears.
