Chapter 10 : Cell reproduction

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chromosomes

structures in the nucleus that contain hereditary material

DNA

coded instructions that control cell activity

fertilization

the joining of an egg and a sperm

gene

segment of DNA controlling production of one protein

meiosis

nuclear division that forms sex cells

mitosis

formation of two nuclei with identical chromosomes

mutation

any permanent change in genetic material of a cell

RNA

a nucleic acid which carries the code for making proteins from the nucleus to the ribosomes

sexual reproduction

reproduction in which a new organism is produced when sex cells combine

zygote

cell that forms in fertilization

Most of the life of any cell is spent in a period of cell growth and development called______________.

interphase

Each human skin cell has _______pairs of chromosomes.

23

All of the following are composed to body cells except (bone, kidney, liver, sperm).

sperm

Human sex cells have ____________individual chromosomes.

23

In sexual reproduction, a new organism is produced when _________.

sex cells combine

By _____________, a new organism can grow from just a part of the parent organism.

meiosis

In _____________, a new organism grows from the body of the parent organism.

budding

The number of chromosomes in a sex cell of an organism is its ___________ chromosome number.

haploid

Meiosis consists of ____division(s) of the nucleus.

two

At the end of meiosis, _______cells have been produced from one cell.

four

Proteins are made of units called ________, which are linked together in a specific order.

amino acids

The code for making proteins is carried to the ribosomes by ________.

mRNA

In DNA, adenine always pairs with ____________.

thymine

Type of reproduction used to make body cells?

mitosis

Type of reproduction used to make sex cells?

meiosis

Type of reproduction that produces new cells with each having half as many chromosomes as the original cell?

meiosis

Type of reproduction that occurs in both plants and animals?

meiosis

Type of reproducion that has eight steps in cell division?

meiosis

Type of reproduction that has four steps in cell division?

mitosis

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