Some of the Embryo's Intestines Remain Within the Umbilical Cord

question 9

Multiple Choice

Some of the embryo's intestines remain within the umbilical cord during the embryonic period.What is the rationale for this development of the gastrointestinal system?

• A) Umbilical cord is much larger at this time than it will be at the end of pregnancy.
• B) Intestines begin their development within the umbilical cord.
• C) Nutrient content of the blood is higher in this location.
• D) Abdomen is too small to contain all the organs while they are developing.

---

Definitions:

Dominant Allele

An allele that expresses its phenotypic effect even when heterozygous with a recessive allele; it masks the effect of a recessive allele.

Heterozygous Individuals

Individuals having two different alleles at a particular genetic locus, one inherited from each parent.

Phenotypic Expression

The observable physical and physiological traits of an organism, which result from the interaction between its genetic makeup and environmental influences.

Human Mutations

Changes or alterations in the genetic material of humans, which can lead to variations in physical or physiological traits.