Aplant can produce either purple flowers or white flowers. what is the probability of purple-flowered offspring if two plants that are heterozygous for purple flowers are crossed? a. 1: 4 b. 2: 4 c. 3: 4 d. 4: 4

The answer is C. 3:4. Let allele A be dominant allele for purple flowers and allele a be recessive allele for white flowers. Heterozygotes (Aa) will have purple flowers because they have one dominant allele. In their cross: Aa x Aa, the offsprings will be: AA, Aa, Aa, aa. So, purple flowers will be AA, Aa, and Aa, which are 3 out of total 4 flowers. In other words, the probability is 3:4.

The open ocean begins at the low-tide mark and extends to the end of the continental shelf

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.

There are no negative consequences to using nuclear energy.  false. how is the   the hydrogen bomb relies on the process of nuclear fission. true.