Notes 7-8
... extravagant plumage of males serves no purpose other than being attractive to females. Big-horn sheep are an example of sexual dimorphism associated with male-male competition. The large horns of males are used in fights with other males. Females mate with the winners. Anisogamy explains Darwin’s ge ...
... extravagant plumage of males serves no purpose other than being attractive to females. Big-horn sheep are an example of sexual dimorphism associated with male-male competition. The large horns of males are used in fights with other males. Females mate with the winners. Anisogamy explains Darwin’s ge ...
Worksheet for grade 12 biology REPRODUCTION IN ORGANISMS
... 1. Bulbils: These are small, fleshy buds which develop into new plants as in Agave. 2. Clone: A group of organism derived from a single individual and hence morphologically and genetically similar. 3. Embryogenesis: The process of development of embryo from zygote. 4. Gametogenesis: The process of f ...
... 1. Bulbils: These are small, fleshy buds which develop into new plants as in Agave. 2. Clone: A group of organism derived from a single individual and hence morphologically and genetically similar. 3. Embryogenesis: The process of development of embryo from zygote. 4. Gametogenesis: The process of f ...
Document
... • Reproduction is the formation of new individuals • The reproductive system produces, stores and releases specialized sex cells known as gametes • Puberty – period of rapid growth and sexual maturation during which the reproductive system becomes fully functional; hormones are released to start thi ...
... • Reproduction is the formation of new individuals • The reproductive system produces, stores and releases specialized sex cells known as gametes • Puberty – period of rapid growth and sexual maturation during which the reproductive system becomes fully functional; hormones are released to start thi ...
Notes 8-9
... Isogamy vs. anisogamy: isogamous species produce gametes of the same size and form; anisogamous species produce gametes that differ in size and form. Some fungi and algae are isogamous. All other sexually reproducing species are anisogamous. The sex that produces the larger gamete is defined to be t ...
... Isogamy vs. anisogamy: isogamous species produce gametes of the same size and form; anisogamous species produce gametes that differ in size and form. Some fungi and algae are isogamous. All other sexually reproducing species are anisogamous. The sex that produces the larger gamete is defined to be t ...
Notes 7-8
... Isogamy vs. anisogamy: isogamous species produce gametes of the same size and form; anisogamous species produce gametes that differ in size and form. Some fungi and algae are isogamous. All other sexually reproducing species are anisogamous. The sex that produces the larger gamete is defined to be t ...
... Isogamy vs. anisogamy: isogamous species produce gametes of the same size and form; anisogamous species produce gametes that differ in size and form. Some fungi and algae are isogamous. All other sexually reproducing species are anisogamous. The sex that produces the larger gamete is defined to be t ...
sexual reproduction
... SEXUAL REPRODUCTION: reproduction involving the exchange of genetic material between two individuals resulting in offspring that are genetically different from the parents -most species of plants and animals reproduce sexually ...
... SEXUAL REPRODUCTION: reproduction involving the exchange of genetic material between two individuals resulting in offspring that are genetically different from the parents -most species of plants and animals reproduce sexually ...
Slide 1
... could possibly lead to elaborate secondary sexual characteristics females could detect differences in the number of deleterious alleles in an male (i.e. athletic ability required for courtship dance confers fitness level) ...
... could possibly lead to elaborate secondary sexual characteristics females could detect differences in the number of deleterious alleles in an male (i.e. athletic ability required for courtship dance confers fitness level) ...
Unit2-KA4
... ________________ is the fusion of the nuclei of the two haploid gametes to produce a z_________ (i.e. the first cell obtained from fertilization). The _____________ will then divide to form the _______________. In land mammals, fertilization takes place ___________________, i.e. the sperm is deposit ...
... ________________ is the fusion of the nuclei of the two haploid gametes to produce a z_________ (i.e. the first cell obtained from fertilization). The _____________ will then divide to form the _______________. In land mammals, fertilization takes place ___________________, i.e. the sperm is deposit ...
19_Sex - life.illinois.edu
... Once we have sexual reproduction, two selection pressures on gametes: Bigger gametes (increase zygote size and survival) More gametes (increase potential number of offspring) ...
... Once we have sexual reproduction, two selection pressures on gametes: Bigger gametes (increase zygote size and survival) More gametes (increase potential number of offspring) ...
Sexual Selection
... Contests can be for direct access to females or to control a better territory. ...
... Contests can be for direct access to females or to control a better territory. ...
Chapter 46: Animal Reproduction
... - What advantage does sex provide? - Produces offspring of different genotypes/phenotypes that enhances reproductive success of parents - Most animals reproduce sexually or asexually; but some alternate between the two. - parthenogenesis: asexual reproduction in which an egg develops without it bein ...
... - What advantage does sex provide? - Produces offspring of different genotypes/phenotypes that enhances reproductive success of parents - Most animals reproduce sexually or asexually; but some alternate between the two. - parthenogenesis: asexual reproduction in which an egg develops without it bein ...
N5- Unit 1 MO4- Reproduction, variation, inheritance Sexual
... sex cells? 2-Meaning of haploid? A cell which nucleus contains only 1 set of chromosomes. In animals, only gametes are haploid. 3-Biological name of an organ Gonad producing sex cells? 4-Male gamete - name - sperm - features - has head and tail section and many mitochondrion - site of production - t ...
... sex cells? 2-Meaning of haploid? A cell which nucleus contains only 1 set of chromosomes. In animals, only gametes are haploid. 3-Biological name of an organ Gonad producing sex cells? 4-Male gamete - name - sperm - features - has head and tail section and many mitochondrion - site of production - t ...
Anisogamy
Anisogamy (noun) (also called heterogamy) refers to a form of sexual reproduction involving the union or fusion of two dissimilar gametes (differing either in size and/or form) — anisogamous, anisogamic, (adj.). The smaller gamete is considered to be male (sperm cell), whereas the larger gamete is regarded as female (egg cell).There are several types of anisogamy. Both gametes may be flagellated and thus motile. Alternatively, neither of the gametes may be flagellated. This situation occurs for example in some algae and plants. In the red alga Polysiphonia, large non-motile egg cells are fertilized by small, non-motile spermatia. In flowering plants, the gametes are non-motile cells within gametophytes.The form of heterogamy that occurs in animals, including humans, is oogamy. In oogamy, a large, non-motile egg cell (ovum) is fertilized by a small, motile sperm cell (spermatozoon). The large egg cell is optimized for longevity, whereas the small sperm cell is optimized for motility and speed. The size and resources of the egg cell allow for the production of pheromones, which attract the swimming sperm cells.