Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
L09
introduction to growth and reproduction
| Question | Answer |
|---|---|
| what are hox genes | encode transcription factors; regulate gene expression by binding to DNA control regions. contain a highly conxerved aa. sequence: homeobox |
| what is the role of hox genes | to establish location |
| what happens when you add Pax6 gene to drosophila | you get multiple eyes |
| what happens when you add Ubx | you get more wings |
| where did the reorgnaiztion of hox genes into a cluster occur? | in the common ancestor of Bilateria |
| how does Hox epression control segmentation? | all arthropods have a similar Hox cluster, but only some are turned on at one time. each unique body plan is associated with a unique pattern of hox expression |
| give examples of ways to reproduce axesually? | binary fission, buddnig, fragmentation, spore production, vegetative reproduction |
| give examples of ways to reproduce asexually in euks specifically | divide and regenerate, budding |
| describe binary fission | equal splitting of the cell with mitosis followed by cytokinesis. many protists use binary fission to separate into halves |
| what are deuteromycetes | imperfect fungi |
| what are the costs of sexual reproduction | higher energy costs and lower success of new individuals |
| benefits of sexual reproduction | generates genetic variation that makes evolutionary adaptation possible |
| what is another phrase for asexual reproduction | vegetative reproduction |
| costs and benefits of vegetative reproduction | lower energy constsants, great for constant envts, poor when need adaptation |
| what are the three fundamental steps of sexual reproduction in animals | gametogenesis, mating, fertilization |
| describe animal sexual life cycle | diplontic - most of time spent diploid |
| describe plant sexual life cycle | alternation of generations...about fifty fifty |
| describe most fungi sexual life cycle | haplontic - most haploid |
| describe the diplonti life cycle | meiosis produces gametes which undergo no further cell division before fertilization. gametes are the only haploid cells..fuse to form a diploid zygote that divides by mitosis |
| describe alternation of generations | two multicellular generations: one diploid and one haploid. Diploid organism (sporophyte) makes haploid spores by meiosis; each spore gorws by mitosis into a haploid organism called a gametophyte. gametophyte makes haplodi gametes by mitsoso |
| describe the haplontic life cycle | only diploid stage is single celled zygote zygote prodcues haploid cells by mieosis which grow by mitosis into haploid multicellular organisms. haploid adult produces gametes by mitosis |
Created by:
nkjohnston1424
Popular Biology sets