Differentiate between monozygotic twins and dizygotic twins. Be very detailed and specific, using all of the following terminology and concepts in your answer: zygote, ova (ovum), sperm, genotype, phenotype
What will be an ideal response
Monozygotic twins result from one ovum being penetrated by one sperm. At an early
point in cell division, the cluster of cells splits into two identical halves. The
genotypes are identical from conception through birth, but the phenotypes can be
altered through variations in genetic replication and environmental influences
throughout the life span. In other words identical twins may not look identical their
entire lives. Also, the genotype itself may be altered over the life span.
Dizygotic twins, also called fraternal twins, result from two separate ova being
fertilized by two separate sperm. Their genotypes, and therefore their phenotypes,
are not any more likely to be identical than regular siblings.
Add
You might also like to view...
Holmes and Rahe reasoned that major sources of stress for people come from
a. failures. b. life events involving loss. c. changes in one's life that require readjustment. d. only those life changes the person sees as negative.
An experiment is a controlled test of a hypothesis in which the researcher manipulates one variable to discover its effect on another
Indicate whether this statement is true or false.
Self-reference and critical thinking are very important to which step in the SQ4R method?
a. experiential processing b. sequential processing c. reflect d. review
The formation of group identity requires which of the following?
A. A sense of having a history of shared experiences B. Adequate financial resources C. A sense of sexual adequacy D. Adequate role containment