Sickle cell anemia is a genetic disease caused by an autosomal
recessive gene. If each parent carries one sickle cell allele, what
are the chances that their child will have sickle cell anemia?
Select one:
•no chance
•one in four
•three in four
•two in four

one in four

Explanation:

The child will be a carrier three out of four, but will have sickle cell one out of four.

Make a punnet square

S s

S. SS. Ss

s. Ss. ss

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )