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
A single set of chromosomes
Are both parent gametes diploid or haploid?
What is the new individual called?
Has two sets of chromosomes (diploid).
Meiosis is a process to convert ______ cell to a ______ gamete.
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).
Male-sex chromosomes are ___-________ (XY).
A pictorial display of metaphase chromosomes from mitotic cell.
Karyotyping uses what kind of pairs?
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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