Agapanthus is a dominant, homozygous lethal trait among telorites from the planet teleflora. subjects with this condition love to send flowers. from a group of telorites heterozygous at the agapanthus locus (with two alleles: a = dominant (trait) allele, a = recessive (wild-type) allele), 88% of the telorites have the agapanthus phenotype, and 12% look wild-type. also, true-breeding wild-type telorites (aa genotype) have 0% penetrance. a telorite with the agapanthus phenotype mates with a true-breeding telorite with the wild-type phenotype. one of the f1 children is randomly selected and is mated back to the true-breeding wild-type parent. out of twenty f2 individuals, we observe the following counts: eight f2 individuals have the agapanthus phenotype; twelve f2 individuals have the wild-type phenotype. the genotype of the randomly-selected f1 subject must be:

Aa

Explanation:

Parents are a Telorite with the Agapanthus phenotype and a true-breeding Telorite with the wild-type phenotype

P: Aa  x aa

F1: Aa Aa aa aa

Phenotype ratios in F2 are 2:3 (Aa:aa). Simce there is Agapanthus phenotype in F2 generation it means that the genotype of the randomly-selected F1 subject is Aa

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."