Purple flowers in pea plants are the result of a dominant allele (P), while white flowers (p) are recessive. In addition, the allele that produces axial flowers (A) is dominant to the allele that produces terminal flowers (a). Two pea plants are crossed and produce 656 offspring, as shown below: Phenotype Number of offspring
Axial, purple flowers 367
Terminal, purple flowers 122
Axial, white flowers 126
Terminal, white flowers 41
Which cross would most likely end in these results?

a
Ppaa × ppAa

b
ppaa × PPAA

c
PpAa × PpAa

d
ppAA × PpAa

All of the produced flowers would be Pp purple is the dominant

form of the allele

your answer is rna to the question.

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation: