Genetics worksheet focusing on Punnett squares, including vocabulary matching, identifying homozygous and heterozygous genotypes, and completing Punnett squares for corn plant height traits.

1. D. homozygous
2. A. alleles
3. B. dominant
4. E. recessive
5. C. heterozygous
6. AA, KK, TT
7. ee, mm, qq, ww
8. AA, EE, RR
9. aa, ff, rr
10. The first and third Punnett squares are correct.
11. The letters on the outside of the Punnett square stand for the alleles from each parent.
12. The letters on the inside of the Punnett square stand for the possible genotypes of the offspring.
13.
- First cross (NN x nn): Offspring are all Nn (heterozygous), so put an X through them.
- Second cross (Nn x Nn): Offspring are NN (homozygous dominant), Nn (heterozygous), and nn (homozygous recessive). Circle the NN and put an X through the Nn.
- Third cross (Nn x nn): Offspring are Nn (heterozygous) and nn (homozygous recessive). Put an X through the Nn.
- Fourth cross (nn x nn): Offspring are all nn (homozygous recessive), so leave them unshaded.