Benchmark 5B
The Living Environment: Heredity
Grades K-2, page 107

Offspring are very much, but not exactly, like their parents and like one another.

NSES Content Standard C
Life Science: Life cycles of organisms 
Grades K-4, page 129 
Plants and animals closely resemble their parents. 

NSES Content Standard C 
Life Science: Reproduction and heredity 
Grades 5-8, page 157 
In many species, including humans, females produce eggs and males produce sperm. Plants also reproduce sexually--the egg and sperm are produced in the flowers of flowering plants. An egg and sperm unite to begin the development of a new individual. That new individual receives genetic information from its mother (via the egg) and its father (via the sperm). Sexually produced offspring never are identical to either of their parents.