What began as a single fertilized egg has just separated into two distinct eggs. This indicates the formation of ____ twins that has occurred during the ____ period of development.
a. fraternal; zygotic
b. fraternal; embryonic
c. identical; zygotic
d. identical; embryonic
Question 2
Who is experiencing the first indicator of the onset of puberty in a typical female?
a. Mary, whose pubic hair has started to grow
b. Terri, who has just begun to menstruate
c. Geri, whose breasts have started to grow
d. Carrie, who has just begun to ovulate
Single-cell circulation model
Raw eggs and other perishables
Identical twins (monozygotic twins) have the same sex and share a single genotype.
Samples of the DNA separated by gel electrophoresis
Biological control agent: a commercially raised parasitoid wasp about to deposit a fertilized egg in
Amoeba, a single-celled heterotroph