Answer:
6 days
Explanation:
once the embryo reaches the Blastocyst stage, approximately 5-6 days after fertilization, it hatches out of it's zona pellucida and begins the process of implantation in the uterus.
1. True
2. False
3. True
4. Flase
5. D.) all of the above
Assuming type a would be an AA allele and type b is a BB allele, No because an AA mother with an AB father wont make a BB child.