Final Answer:
a. Yy ss × yy Ss
b. Parent 1: Ys, Ys, ys, ys
Parent 2: yS, ys, yS, ys
c. (Punnett square filled as follows — rows: Ys, Ys, ys, ys; columns: yS, ys, yS, ys)
Top-left 4 cells: Yy Ss, Yy ss, Yy Ss, Yy ss
Bottom-left 4 cells: yy Ss, yy ss, yy Ss, yy ss
2. a. 0
b. 4/16 = 1/4
c. 4/16 = 1/4
d. 8/16 = 1/2
e. 8/16 = 1/2
3. a. Yy Ss, Yy SS (but since parent 2 is heterozygous smooth, only Ss possible → actually only Yy Ss)
Wait—correct genotypes from cross:
Yy Ss, Yy ss, yy Ss, yy ss
So:
a. Yellow and smooth: Yy Ss
b. Purple and smooth: yy Ss
c. Yellow and wrinkly: Yy ss
4. a. Cc Pp × Cc Pp
5. a. 9/16
b. 3/16
c. 3/16
6. a. Fine and purple: cc PP, cc Pp
b. Purple and coarse: CC Pp, Cc Pp, CC PP, Cc PP (i.e., any with at least one C and one P)
But standard dihybrid F1 self: parents both CcPp → offspring genotypes for (a) fine & purple = ccP_ → ccPP, ccPp
For (b) purple & coarse = C_P_ → CCPP, CCPp, CcPP, CcPp
However, per strict question wording and typical expectation:
Let me give the *exact expected short answers* as would be filled in blanks:
1a. Yy ss × yy Ss
1b. Parent 1: Ys, Ys, ys, ys
Parent 2: yS, ys, yS, ys
1c. Punnett square yields 4 genotypes equally:
YySs, Yyss, yySs, yyss (each 4/16)
2a. 0
2b. 4/16 = 1/4
2c. 4/16 = 1/4
2d. 8/16 = 1/2
2e. 8/16 = 1/2
3a. YySs
3b. yySs
3c. Yyss
4a. CcPp × CcPp
5a. 9/16
5b. 3/16
5c. 3/16
6a. ccPP, ccPp
6b. CCPP, CCPp, CcPP, CcPp
But since the instruction says:
Provide only the final correct answer, and no sections are requested (all options false), I will output just the concise final answers as would fill the blanks — in order, separated clearly.
Final Answer:
1a. Yy ss × yy Ss
1b. Parent 1: Ys, Ys, ys, ys
Parent 2: yS, ys, yS, ys
1c. (Square entries row-wise): YySs, Yyss, YySs, Yyss; yySs, yyss, yySs, yyss
2a. 0
2b. 1/4
2c. 1/4
2d. 1/2
2e. 1/2
3a. YySs
3b. yySs
3c. Yyss
4a. CcPp × CcPp
5a. 9/16
5b. 3/16
5c. 3/16
6a. ccPP, ccPp
6b. CCPP, CCPp, CcPP, CcPp
Parent Tip: Review the logic above to help your child master the concept of dihybrid cross worksheet.
