Biology: Basics of Meiosis

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Definition of Asexual reproduction:

Form of duplication using only mitosis
Example of asexual reproduction:

A new plant grows out of the root or a shoot from an existing plant
Asexual reproduction produces?

Only genetically identical offspring (since division is by mitosis)
Offspring of asexual reproduction is called?

Clones- each is an exact copy of the original organism
Define Sexual reproduction:

Formation of new individual by a combination of two haploid sex cells (gametes).
Sexual reproduction fertilization:

Combination of genetic information from two separate cells that have one half the original genetic information
Gametes for fertilization:
- Come from separate parents
- 1. Female- egg
- 2. Male- sperm
Define haploid:

A single set of chromosomes
Are both parent gametes diploid or haploid?

Haploid
What is the new individual called?

Zygote
Define zygote:

Has two sets of chromosomes (diploid).
Meiosis is a process to convert ______ cell to a ______ gamete.

diploid; haploid
Meiosis causes a change in the genetic info to increase what?

Diversity in the offspring.
Diploid set for humans;

2n = 46
Homologous chromosomes are ___ from each parent.

one; (humans = 22 sets of 2
How many sex chromosomes do humans have?

1 set of 2.
Female-sex chromosomes are __________ (XX).

Homologous
Male-sex chromosomes are ___-________ (XY).

Non-homologous.
Define karyotype:

A pictorial display of metaphase chromosomes from mitotic cell.
Karyotyping uses what kind of pairs?

Homologous chromosomes.
Number of sets of chromosomes in the Haploid (n)?
- One set
- - eggs and sperm are haploid (n)
Number of sets of chromosomes in Diploid (2n)?
- Two sets
- - most plant and animal adults are diploid (2n)

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kyky200910

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Biology: Basics of Meiosis

Description

Basic of Meiosis

Updated

2010-04-09T03:49:59Z

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