Why do you think onion cell do not have chloroplast

Onion cells lack chloroplasts because the onion is part of the plant that is not involved in photosynthesis. the part of the plant eaten by humans is called the bulb, and it resides at the base of the plant. the bulb’s primary purpose is energy storage and holding the flower for the second growing season. growing near the ground, the bulb is in poor position to collect sunlight.hope this : )

4, two dominant and two recessive