stages of mammalian animal development

Question 1

the fusion of sperm and egg to form a zygote.

Answer 1

fertilization

Question 2

It occurs in the fallopian tube in mammals, and the zygote contains a complete set of genetic material.

Answer 2

fertilization

Question 3

What happens during the cleavage stage of mammalian development?

Answer 3

During cleavage, there are rapid cell divisions without growth, forming a morula (a solid ball of cells). This prepares the embryo for implantation in the uterus.

Question 4

What occurs during blastulation in mammalian development?

Answer 4

The morula transforms into a blastocyst (a hollow structure), which then implants into the uterine wall. The blastocyst contains the inner cell mass, which will develop into the embryo.

Question 5

is the formation of three germ layers:

Ectoderm (skin, nervous system)
Mesoderm (muscles, bones, circulatory system)
Endoderm (digestive and respiratory systems)
It also establishes body symmetry and major axes.

Answer 5

gastrulation

Question 6

The neural tube forms, which will develop into the brain and spinal cord.

Answer 6

Neurulation

Question 7

Organs begin to develop from the germ layers.

Answer 7

Organogenesis

Question 8

What occurs during fetal development?

Answer 8

During fetal development, organs grow and mature. Limbs, facial features, and internal structures form, and the fetus becomes viable, meaning it can survive outside the womb.

Question 9

What happens during birth in mammalian development?

Answer 9

Hormonal signals trigger labor and contractions, and the baby is delivered through the birth canal, marking the transition to independent life.