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.
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Marla just gave birth to her first child, Jennifer. As soon as Jennifer was born,
the medical staff carefully examined her because they knew Marla smoked heavily throughout her pregnancy even when advised not to. Which of the following statements is likely true for baby Jennifer? a) She has a higher risk for low birth weight. b) She is at risk for developing anxiety issues later on in life. c) She has FAS. d) She will likely have attention deficit disorder or reading disabilities.
Description is one of the primary objectives of science
Indicate whether the statement is true or false