Meiosis & Genetic Recombination Flashcards
Reproduction producing genetically identical whole populations…
Mitosis
A stable & resourceful method of populating…
Asexual Reproduction
Pros of asexual reproduction?
Fast!
Energy Savings
Cons of asexual reproduction?
No genetic diversity! (Antibiotic Resistance)
Passes on 100% of genes to offspring
This leads to greater diversity in a population..
Sexual recombination!
This diversity comes from =
Genetic Recombination
Greater variation in the population leads to:
Stability & Longevity
Individually variation comes from 1 or 2 sources:
Meiosis
Recombination
Animals have a ___________ life cycle.
Diplontic
Only single celled diploid state for humans?
Zygote
Funi have a ________ life cycle.
Haplontic
Multicellular fungi are all ________.
Haploid
In haplontic, gametes are produced by ______ and are ________.
Mitosis
Haploid
Plants have a ___________ life cycle.
Haplodiplontic
In plants, gametes are produced by _______
Mitosis & Meiosis
Haploid (Mitosis/Asexual) & Diploid (Meiosis)
In Plants, haploid multicellular organisms create…
Gametophyte
In Plants, diploid multicellular organisms creat…
Sporophytes
Haploid cells have ___ complete set of genes & there are __ in humans.
One, 23
In individual chromosomes (autosomes) what is largest & smallest?
1 –> 22
The 23rd?
X or Y (Sex Chromosomes)
Therefore, a haploid set =
22+1 Sex Chromosome
Diploid cells have ___ complete sets or __ chromosomes with __ or __.
Two
46
XX or XY
Diploid chromosomes appear as:
Homologous Pairs
Homologous pairs have:
2 Pairs of each gene
In homologous pairs, entire sets come from:
Maternal (23) and Paternal (23)
Different forms of the same gene are…
Alleles
The human karyotype has:
22 Pairs of Autosomes
1 Pair of Sex Chromosomes
Homologous pairs are….
Diploid
If no homologous pairs…
Haploid
Diploid cells have __ sets of chromosomes.
2
Haploid cells have __ set of chromosomes.
1
