1.
c)25%, Ccpp
P: CcPp x ccpp
G: CP, Cp, cP, cp x cp
F1: CcPp, Ccpp, ccPp, ccpp
_______CP________Cp________cP_______cp
cp_____CcP______Ccpp______ccPp______ccpp
2.
d.1) genotipul-100% heterozigoţi (Aa), fenotipic - 100% şoareci gri; 2) AA (homozigot dominant), Aa (heterozigot), aa (homozigot recesiv); 3) raportul genotipic - 1:2:1
P: AA x aa
G: A x a
F1: Aa x Aa
G: A, a x A, a
F2: AA, 2Aa, aa
3.
b.1) 8 tipuri de gameţi; 2) 12,5%
1)
AaBbCc ---> 8 gameti, 2*2*2=8
2)
P: AaBbCc x aabbcc
G: ABC, Abc, AbC, aBC, Abc, aBc, abC, abc x abc
F1: AaBbCc, Aabbcc, AabbCc, aaBbCc, Aabbcc, aaBbcc, aabbCc, aabbcc
4.
d.1) AaBb x aabb; 2) 100% gameţi ab produce părintele dublu homozigot recesiv şi 25% gameţi ab produce părintele dublu heterozigot
P: AaBb x aabb
G: AB, Ab, aB, ab x ab
F1: AaBb, Aabb, aaBb, aabb
5.
b)caracterul bob neted şi verde de la Pisum sativum poate fi redat genotipic astfel: Aabb, AAbb