In four o'clock flowers, red petals show incomplete dominance over white petals. If two pink flowers are crossed, 50 percent of the flowers will be homozygous, and 25 percent of the flowers will be heterozygous.
<span>Sterilization of animals reduces the level of circulating reproductive hormones leading to increased longevity, typically due to reduce cancer mortality. The primary aim of animal sterilization is avoiding overpopulation, but this increased longevity could be an added benefit for an individual animal.</span>
