Practice Midterm Solutions
... 6. Male and female yellow mice are crossed. Over several litters, a 2:1 ratio of yellow to wild-type (agouti) pups were produced. If the symbol “Y” represents the allele associated with yellow body color, which symbols below most accurately describe the genotypes of the offspring? a) Yy and yy b) Y ...
... 6. Male and female yellow mice are crossed. Over several litters, a 2:1 ratio of yellow to wild-type (agouti) pups were produced. If the symbol “Y” represents the allele associated with yellow body color, which symbols below most accurately describe the genotypes of the offspring? a) Yy and yy b) Y ...
Notes 8-9
... There is great variety in modes of sexual reproduction 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 ...
... There is great variety in modes of sexual reproduction 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 ...
Notes 7-8
... There is great variety in modes of sexual reproduction 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 ...
... There is great variety in modes of sexual reproduction 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 ...
Aim: How do organisms reproduce?
... 1) the creation of a new individual from only 1 parent. 2)Genetic information of offspring is identical to the parent. ...
... 1) the creation of a new individual from only 1 parent. 2)Genetic information of offspring is identical to the parent. ...
Notes 7-8
... (i.e., the number of children the individual has) plus the amount of fitness an individual induces in its close relatives (i.e., the number of offspring the close relatives of the individual has). Eusocial behavior in insects (such as ants and bees) may be partly explained by the unusual sex determi ...
... (i.e., the number of children the individual has) plus the amount of fitness an individual induces in its close relatives (i.e., the number of offspring the close relatives of the individual has). Eusocial behavior in insects (such as ants and bees) may be partly explained by the unusual sex determi ...
Reproductive Patterns
... Organisms that reproduce asexually do NOT have a gender or sex organs. For example: There are NOT male and female bacteria….just bacteria. ...
... Organisms that reproduce asexually do NOT have a gender or sex organs. For example: There are NOT male and female bacteria….just bacteria. ...
To reproduce - SDSU Heart Institute
... • individuals evaluate potential mates relative to available pool of possibilities to select superior candidates for mating • superior candidates should theoretically combine to produce progeny with best chance of survival • if criteria are not met, sexual desire does not occur • success depends upo ...
... • individuals evaluate potential mates relative to available pool of possibilities to select superior candidates for mating • superior candidates should theoretically combine to produce progeny with best chance of survival • if criteria are not met, sexual desire does not occur • success depends upo ...
What is the difference between asexual and sexual reproduction?
... Compare and Contrast Asexual and Sexual Reproduction: Include the following points: a. How many parents are required? b. What percentage of parent DNA is found in the offspring DNA? (100% vs. 50 %) c. Is the offspring identical or not identical to the parent? d. Is fertilization required (Are sperm ...
... Compare and Contrast Asexual and Sexual Reproduction: Include the following points: a. How many parents are required? b. What percentage of parent DNA is found in the offspring DNA? (100% vs. 50 %) c. Is the offspring identical or not identical to the parent? d. Is fertilization required (Are sperm ...
Eisenia veneta - St. Olaf Pages
... o males die, females lose wings and become new queens Queens lay eggs who will become her workers as adults Queens wait in chamber during this time, using fat reserves and wing muscle as energy source Total lifespan: 6-12 weeks. o Can be increased for up to 10 months if cold After about 2 years of c ...
... o males die, females lose wings and become new queens Queens lay eggs who will become her workers as adults Queens wait in chamber during this time, using fat reserves and wing muscle as energy source Total lifespan: 6-12 weeks. o Can be increased for up to 10 months if cold After about 2 years of c ...
File - Mrs. LeCompte
... Polyandrous = a single female mates with several males o Often occurs when child requires help from a male parent or when the environment does not have enough resources to support lots of offspring at one time Monogamous = when one male mates with only one female form a pair bond o Both male a ...
... Polyandrous = a single female mates with several males o Often occurs when child requires help from a male parent or when the environment does not have enough resources to support lots of offspring at one time Monogamous = when one male mates with only one female form a pair bond o Both male a ...
lecture 09 - sexual selection - Cal State LA
... Males compete for territory, control of females, or opportunities to fertilize; females just go with the winner (2) Sperm competition is a form of post-mating competition - males can make larger ejaculates when there’s competition for females - can be triggered by scent of nearby competitor males - ...
... Males compete for territory, control of females, or opportunities to fertilize; females just go with the winner (2) Sperm competition is a form of post-mating competition - males can make larger ejaculates when there’s competition for females - can be triggered by scent of nearby competitor males - ...
10-Sociality
... Protandry -- Protogyny (Social control) Parthenogenesis (unisexual species) Possible advantages of sexual reproduction include: two parents can raise twice as many progeny mix genes with desirable genes (enhances fitness) reduced sibling competition heterozygosity biparental origin of many unisexual ...
... Protandry -- Protogyny (Social control) Parthenogenesis (unisexual species) Possible advantages of sexual reproduction include: two parents can raise twice as many progeny mix genes with desirable genes (enhances fitness) reduced sibling competition heterozygosity biparental origin of many unisexual ...
Slide 1
... Direct Benefit: Certain male characters (nuptial gifts of food or defensive compounds, care provided to offspring) ...
... Direct Benefit: Certain male characters (nuptial gifts of food or defensive compounds, care provided to offspring) ...
Evolution by Natural Selection
... Inference 2: Each generation will contain a greater percentage of individuals with these favorable traits leading to a change in the average characteristics of a population over time. This is called evolution. ...
... Inference 2: Each generation will contain a greater percentage of individuals with these favorable traits leading to a change in the average characteristics of a population over time. This is called evolution. ...
Chapter 46: Animal Reproduction
... - Internal fertilization usually results in a small amount of offspring - It is usually accompanied by the greater protection of embryos and parental care - Reproductive systems range from undifferentiated cells in the body cavity that creates gametes to complex assemblages of male and female gonads ...
... - Internal fertilization usually results in a small amount of offspring - It is usually accompanied by the greater protection of embryos and parental care - Reproductive systems range from undifferentiated cells in the body cavity that creates gametes to complex assemblages of male and female gonads ...
Sexual and Asexual Reproduction - UNC
... In contrast to sexual reproducers, every organism that reproduces asexually passes on its entire set of genes to the next generation. These species have a few distinct advantages over those that mate in pairs. Since it does not need a sexual partner, a lone individual can establish a new population ...
... In contrast to sexual reproducers, every organism that reproduces asexually passes on its entire set of genes to the next generation. These species have a few distinct advantages over those that mate in pairs. Since it does not need a sexual partner, a lone individual can establish a new population ...
Structure of mating systems
... We can assume that the primary sex ratio in humans is 1:1. But we’d be wrong. The primary sex ratio is somewhere between 1.079 (1948 Carnagie Institute data) and 1.2-1.6:1. Why? One favorite explanation: Y-bearing sperm are lighter (Y is smaller than X) and more motile. The secondary sex ratio is 1. ...
... We can assume that the primary sex ratio in humans is 1:1. But we’d be wrong. The primary sex ratio is somewhere between 1.079 (1948 Carnagie Institute data) and 1.2-1.6:1. Why? One favorite explanation: Y-bearing sperm are lighter (Y is smaller than X) and more motile. The secondary sex ratio is 1. ...
Sexual Selection
... The most persistent males are the most successful breeders Extended effort into breeding activity shows that the animal is in good physical condition and is an efficient forager. ...
... The most persistent males are the most successful breeders Extended effort into breeding activity shows that the animal is in good physical condition and is an efficient forager. ...
Notes part 1
... ii. There is (genetic) variation among offspring iii. There is a struggle to survive iv. Natural selection is always taking place ...
... ii. There is (genetic) variation among offspring iii. There is a struggle to survive iv. Natural selection is always taking place ...
Reproductive Strategies
... extinct. A population size of zero is also unique in that subsequent recovery (increase in size) is not possible. K- and r- strategists Different species vary in the amount of time and energy they use to raise their offspring. There are two extremes. Species like humans and other large mammals have ...
... extinct. A population size of zero is also unique in that subsequent recovery (increase in size) is not possible. K- and r- strategists Different species vary in the amount of time and energy they use to raise their offspring. There are two extremes. Species like humans and other large mammals have ...
Natural Selection
... best suited to survive in their particular circumstances have a greater chance of passing their traits on to the next generation. Plants and animals interact in complex ways with other organisms and their environment; like this hummingbird and flower which have evolved to be perfectly suited to each ...
... best suited to survive in their particular circumstances have a greater chance of passing their traits on to the next generation. Plants and animals interact in complex ways with other organisms and their environment; like this hummingbird and flower which have evolved to be perfectly suited to each ...
The PowerPoint
... We should be sexually attracted to others whose characteristics would maximize our genetic success, that is, would give us many healthy, long-lived, fertile children. We should therefore find healthiness attractive and, conversely, illness unattractive. We should find "perfect" features attractive, ...
... We should be sexually attracted to others whose characteristics would maximize our genetic success, that is, would give us many healthy, long-lived, fertile children. We should therefore find healthiness attractive and, conversely, illness unattractive. We should find "perfect" features attractive, ...
Parental investment
Parental investment (PI), in evolutionary biology and evolutionary psychology, is any parental expenditure (time, energy etc.) that benefits one offspring at a cost to parents' ability to invest in other components of fitness, and is thus a form of sexual selection. Components of fitness include the wellbeing of existing offspring, parents' future sexual reproduction, and inclusive fitness through aid to kin. Parental investment may be performed by both the male and female (biparental care), the mother alone (exclusive maternal care) or the father alone (exclusive paternal care).Initially introduced in 1930 by the English biologist and statistician Ronald Fisher, parental care is found in a broad range of taxonomic groups, including both ectothermic (invertebrates, fish, amphibians and reptiles), and endothermic (birds and mammals) species. Care can be provided at any stage of the offspring's life: pre-natal care including behaviours such as egg guarding, preparation of nest, brood carrying, incubation, and placental nourishment in mammals; and post-natal care including food provisioning and protection of offspring.