Chapter 11- Section 2 Flashcards Preview

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Flashcards in Chapter 11- Section 2 Deck (12):
0

A form of cell division that produces sex cells and reduces the chromosome number by half by dividing twice

Meiosis

1

The pairing of homologous chromosomes

Synapsis

2

Each pair of homologous chromosomes

Tetrad

3

The exchange of genetic material between maternal and paternal chromosomes which results in genetic recombination

Crossing over

4

Random separation of homologous chromosomes

Independent assortment

5

Adds genetic variation because the zygote that forms is made by the random joining of two gametes

Random fertilization

6

Process where an undiparentiated germ cell develops into 4 haploid sperm cells

Spermatogenesis

7

Process where an undifferentiated germ cell develops into an ovum plus 3 haploid polar bodies

Oogenesis

8

List the forms of asexual reproduction

• Binary Fission
• Splitting
• Fragmentation
• Budding
• Vegetative Reproduction
• Parthenogenesis

9

List all of the advantages and disadvantages of asexual reproduction

ADVANTAGES: Large numbers of offspring very quickly, no male selection
DISADVANTAGES: Susceptible to environmental change

10

List all of the advantages in sexual reproduction

Offspring are genetically diverse and more likely to survive environmental change

11

Compare and contrast Meiosis and Mitosis

MITOSIS: in body cells, goes through one division, results in two identical diploid cells, has a full set of chromosomes
MEIOSIS: in sex cells, two divisions, results in four genetically diverse haploid cells with half the chromosomes