Exam 33: Reproduction and Development

In the last few weeks of pregnancy,the level of estrogen in a woman's blood rises.This causes

If gametes were produced by mitosis instead of meiosis in diploid organisms,zygotes would have ________ set(s)of chromosomes.

All layers of skin are derived from the mesoderm.

The three layers of cells in a human embryo are ectoderm,endoderm,and ________.

The mitochondria in your cells are a mix of the mitochondria found in your father's sperm and your mother's egg cell because the contents of the sperm cytoplasm are dumped into the egg cell during fertilization.

Which of the following structures are commonly manipulated for sterilization?

Which of the following statements about sexual and asexual reproduction is true?

The quality of human eggs declines as people age.One possible reason for this is

Different versions of the protein hemoglobin are found in a baby's blood cells at different stages of development.Changes in the hemoglobin type present are most likely the result of

The cells of the morula are totipotent,meaning they can differentiate into any cell type.

Oogenesis produces one egg from a germ line cell.Spermatogenesis results in the production of ________ sperm from a germ line cell.

Morphogens,cell to cell signals,and hormones can all influence gene expression.

Sperm are packed with mitochondria because mitochondria produce the

Which of the following does NOT affect development in animals?

During development,the process by which unspecialized cells acquire specific identities is called

The moment of conception is when the embryo implants into the endometrium.

Which one of the following methods of reproduction is NOT used by animals?

When a human embryo is approximately 7 days old,it embeds in the ________ of its mother's uterus,where it is nourished by the surrounding blood supply until the placenta is functional.

A woman with high blood pressure and a history of breast cancer asks her doctor to recommend a birth control method.Based on the woman's medical history,the doctor is LEAST likely to recommend

Two methods for preventing pregnancy are abstinence and ________.