Fertilization and Embryonic Development

Repeated cell divisions during embryonic cell development is known as:___________.

• Fertilization
• Cleavage
• oogenesis
• spermatogensis

Human reproduction usually involves

• internal fertilization and internal development
• external fertilization and external development
• internal fertilization and external development
• external fertilization and internal development

Meiosis and fertilization are important processes because they may most immediately result in

• many body cells
• immune responses
• genetic variation
• natural selection

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

External fertilization is common for organisms that live in:

• Trees
• Water
• Land
• Ummm, I'm pretty sure you didn't teach us this...

The joining of a sperm cell and an egg cell is called...

• Fertilization
• Labor
• Zygote
• STOP ASKING ME THESE IMPOSSIBLE QUETSIONS!!

Which of the following sequences represents the correct order of events in the formation of a human fetus?

• Zygote → Blastocyst → Embryo → Fertilization

• Fertilization → Zygote → Blastocyst → Embryo

• Blastocyst → Embryo → Differentiation → Zygote

• Fertilization → Growth → Differentiation → Zygote

Which of the following is true of a zygote?

• It forms into a blastocyst
• It is an unfertilized egg
• It produces haploid male gametophytes
• It is made up of only one cell

The diagram below shows a cellular process that occurs in organisms.
What is the name of this process?

• meiosis
• mitosis
• endocytosis
• phagocytosis

Tags

NGSS.HS-LS3-2

NGSS.HS-LS1-4

The diagram below shows homologous chromosomes during prophase I of meiosis
Which of the following correctly describes the process being illustrated?

• mutation in which the DNA content of the gene is altered
• segregation of sister chromatid
• condensation and segregation of alleles
• crossing-over in which alleles are exchanged

Tags

NGSS.HS-LS3-2

A scientist wants to change the DNA of a sexually reproducing organism and have the new DNA present in every cell of the organism. In order to do this after fertilization, she would change the DNA in which of the following?

• zygote
• placenta
• testes of the father
• ovaries of the mother

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1