A puppy has gray fur. Both parents have black fur, but one grandparent had gray fur. What explanation best fits the puppy's coat color?

After practicing guitar for months, Jordan develops thicker skin on the fingertips, while Jordan's parents do not have this trait. How should this fingertip trait be classified?

A houseplant's leaves grow pale after weeks in a dark closet, but new cuttings grow green under bright light. What does this evidence show about the pale leaves?

A cat has a clipped ear tip after a veterinarian marks it during rescue. If the cat later has kittens, what should be expected about the kittens' ear tips?

Mia dyes her brown hair blue for a school event. Years later, her baby has brown hair. What explains why the baby did not inherit blue hair?

A dog learns to sit when its owner gives a hand signal. The dog's puppies sit only after training. What does the evidence show about this behavior?

Two puppies have the same parents, but one has longer fur than the other. What best explains this difference?

Two pea plants come from the same parent pair. One plant makes round seeds, and the other makes wrinkled seeds. How can siblings from the same parents differ?

A litter of mice has some black offspring and some brown offspring, even though all were born at the same time. What is the best inheritance explanation?

A mother plant and a father plant produce many seeds. The seedlings are similar but not identical. What process most helps create these differences?

Two kitten siblings have the same parents. One has green eyes, and the other has amber eyes. What explains this variation?

In one bird nest, chicks from the same parents hatch with slightly different beak lengths. Why are the chicks not exact copies of each other?

A strawberry plant sends out runners that make new plants. Another strawberry plant makes seeds after pollination. Which offspring group will usually show more variation?

A calf and its full sibling share the same parents, but one has a white face and the other does not. What explains the difference?

In three generations of bean plants, purple flowers appear in parents and in some offspring grown in the same soil. What does this evidence suggest about flower color?

Snails from banded-shell parents produce both banded and plain-shell offspring in two different tanks. What claim is best supported by this evidence?

In a rabbit family record, short ears and long ears appear in grandparents, parents, and offspring. What does the repeated pattern across generations suggest?

A farmer saves seeds from the tallest corn plants. Their offspring include many tall plants and some shorter plants. What does the evidence show?

A dog family has black, yellow, and brown coat colors across parents, puppies, aunts, and uncles raised in different homes. What does the pattern suggest?

In a classroom investigation, pea offspring show tall and short stems when parent plants with those stem traits are crossed. What conclusion fits the evidence?