Development of the Male and Female
... The development of the reproductive systems begins soon after fertilization of the egg, with primordial gonads beginning to develop approximately one month after conception. Reproductive development continues in utero, but there is little change in the reproductive system between infancy and puberty ...
... The development of the reproductive systems begins soon after fertilization of the egg, with primordial gonads beginning to develop approximately one month after conception. Reproductive development continues in utero, but there is little change in the reproductive system between infancy and puberty ...
Mating Systems in Sexual Animals | Learn Science at Scitable
... Mate choice is also a key element of mating systems. In most species, females are choosier when picking a mate than males. A significant reason for this is the higher investment females make in each gamete than males. Females may prefer certain males for a variety of reasons, including "good genes", ...
... Mate choice is also a key element of mating systems. In most species, females are choosier when picking a mate than males. A significant reason for this is the higher investment females make in each gamete than males. Females may prefer certain males for a variety of reasons, including "good genes", ...
Hoofed Species Show
... Breeding: Blacktails are polygamous. They use scent to locate each other during the breeding period. Males tend to follow one female at a time until breeding occurs or a larger male comes along and displaces them. Distinguishing Features: -Smallest of the three native deer species (mule, blacktailed ...
... Breeding: Blacktails are polygamous. They use scent to locate each other during the breeding period. Males tend to follow one female at a time until breeding occurs or a larger male comes along and displaces them. Distinguishing Features: -Smallest of the three native deer species (mule, blacktailed ...
Mendelian Genetics - Northeast High School
... Sex-linked traits are found on the _____________________________________. Typically they are most often expressed in ________ because they have only one ___ chromosome. A ________ can be affected; however, it is rare. Some of the time, a female can be a __________, which means that she has one _____ ...
... Sex-linked traits are found on the _____________________________________. Typically they are most often expressed in ________ because they have only one ___ chromosome. A ________ can be affected; however, it is rare. Some of the time, a female can be a __________, which means that she has one _____ ...
Female modulation of reproductive rate and its role in postmating
... female interactions have been shown to evolve rapidly under positive selection and to be polymorphic (Vacquier 1998; Palumbi 1999; Swanson & Vacquier 2002a, 2002b) and often species-specific (Chen 1984; Vacquier 1998), demonstrating the importance of cryptic isolation. However, the general role of c ...
... female interactions have been shown to evolve rapidly under positive selection and to be polymorphic (Vacquier 1998; Palumbi 1999; Swanson & Vacquier 2002a, 2002b) and often species-specific (Chen 1984; Vacquier 1998), demonstrating the importance of cryptic isolation. However, the general role of c ...
Genetics Practice Problems
... chickens, but it is easy to tell, by visual observation, whether the feathers are "barred." The barred pattern is inherited as a sex-linked dominant trait. This trait is used regularly by chicken breeders who receive orders for only male or female chicks, and must be able to deliver the appropriate ...
... chickens, but it is easy to tell, by visual observation, whether the feathers are "barred." The barred pattern is inherited as a sex-linked dominant trait. This trait is used regularly by chicken breeders who receive orders for only male or female chicks, and must be able to deliver the appropriate ...
Types of Reproduction PowerPoint
... Asexual Reproduction • A new organism (sometimes more than one) is produced from one parent. • The offspring will have hereditary material that matches the hereditary material of the parent. This means they are genetically identical. ...
... Asexual Reproduction • A new organism (sometimes more than one) is produced from one parent. • The offspring will have hereditary material that matches the hereditary material of the parent. This means they are genetically identical. ...
ASexual Reproduction
... to express a certain gene) necessary to break down a specific type of food, yet others of the same species within the population are able to break down that food. What happens if the uncertain or less favorable conditions lead to that being the primary food source? ...
... to express a certain gene) necessary to break down a specific type of food, yet others of the same species within the population are able to break down that food. What happens if the uncertain or less favorable conditions lead to that being the primary food source? ...
Lesson 3- monohybrid crosses
... • An organism is said to be TRUE BREEDING if, when crossed with another organism of the same strain, it always produces offspring of exactly the same kind ...
... • An organism is said to be TRUE BREEDING if, when crossed with another organism of the same strain, it always produces offspring of exactly the same kind ...
Pollinator Paradise
... Females collect insect prey to feed the grub-like larvae. Social species are also attracted to carrion and picnic food. Adults visit flowers, watermelon, and soda cans for the sugar water which provides energy. They may do some pollinating on the flowers, but they tend not to visit a large number of ...
... Females collect insect prey to feed the grub-like larvae. Social species are also attracted to carrion and picnic food. Adults visit flowers, watermelon, and soda cans for the sugar water which provides energy. They may do some pollinating on the flowers, but they tend not to visit a large number of ...
Practicing Punnett Squares – Monohybrid Simple Dominant
... 5. The ability to roll the tongue (R) is determined by a dominant gene while the recessive gene results in the inability to roll the tongue (r). A man and his wife can both roll their tongues and are surprised to find that their son cannot. Explain this by showing the genotypes of all three persons. ...
... 5. The ability to roll the tongue (R) is determined by a dominant gene while the recessive gene results in the inability to roll the tongue (r). A man and his wife can both roll their tongues and are surprised to find that their son cannot. Explain this by showing the genotypes of all three persons. ...
Reproduction - VCE
... There are three main categories for honey bees. 1. The queen lays eggs. She mates once and retains the sperm for the rest of her life. 2. Fertilized eggs become sterile female workers. 3. Unfertilized eggs develop into male drones via parthenogenesis. ...
... There are three main categories for honey bees. 1. The queen lays eggs. She mates once and retains the sperm for the rest of her life. 2. Fertilized eggs become sterile female workers. 3. Unfertilized eggs develop into male drones via parthenogenesis. ...
Punnett Squares and Probability
... therefore the start of their genotypes is XX. Males have an X and Y chromosome, therefore the start of their genotypes is XY. 50% of offspring are always male and 50% if the offspring are always female ...
... therefore the start of their genotypes is XX. Males have an X and Y chromosome, therefore the start of their genotypes is XY. 50% of offspring are always male and 50% if the offspring are always female ...
extra credit: problems in genetics
... dominance, use the capital letter of each trait or color. Punnett Squares are handy in working these problems. Show all your work on this sheet and record your answers in the spaces provided. Express proportions as fractions. Turn in the completed sheets for a grade. 1. In peas, yellow color is domi ...
... dominance, use the capital letter of each trait or color. Punnett Squares are handy in working these problems. Show all your work on this sheet and record your answers in the spaces provided. Express proportions as fractions. Turn in the completed sheets for a grade. 1. In peas, yellow color is domi ...
Endocrine System
... Process in which a system is turned off by the condition it produces When the amount of a particular hormone in the blood reaches a certain level, the endocrine system send signals that stop the release of that hormone. ...
... Process in which a system is turned off by the condition it produces When the amount of a particular hormone in the blood reaches a certain level, the endocrine system send signals that stop the release of that hormone. ...
Male and Female Reproductive Systems
... a. The penis is the organ from which urine or semen travel out of. 5. There are 5 to 10 million sperm per drop. C. The Female Reproductive System 1. There are two ovaries located below the waist, one on each side of the body. 2. One major role of the ovaries is to produce ova (eggs). ...
... a. The penis is the organ from which urine or semen travel out of. 5. There are 5 to 10 million sperm per drop. C. The Female Reproductive System 1. There are two ovaries located below the waist, one on each side of the body. 2. One major role of the ovaries is to produce ova (eggs). ...
Genetics Practice Problems
... cannot roll their tongues. Bob can roll his tongue, but his mother could not. He is married to Sally, who cannot roll her tongue. What is the probability that their first born child will not be able to roll his tongue? 7. In goats, a recessive gene causes the goats to "faint" when they are startled. ...
... cannot roll their tongues. Bob can roll his tongue, but his mother could not. He is married to Sally, who cannot roll her tongue. What is the probability that their first born child will not be able to roll his tongue? 7. In goats, a recessive gene causes the goats to "faint" when they are startled. ...
Reproductive Physiology
... » Jacob’s syndrome: Individuals are somewhat taller than average and often have below normal intelligence. At one time (~1970s), it was thought that these men were likely to be criminally aggressive, but this hypothesis has been disproven over time. » XXYY – male and very rare (48 chromosomes) – XXX ...
... » Jacob’s syndrome: Individuals are somewhat taller than average and often have below normal intelligence. At one time (~1970s), it was thought that these men were likely to be criminally aggressive, but this hypothesis has been disproven over time. » XXYY – male and very rare (48 chromosomes) – XXX ...
Methods of Reproduction
... can use to swim towards the egg cell. External fertilization usually occur in fish and amphibians. • The females lay the eggs in the water and ...
... can use to swim towards the egg cell. External fertilization usually occur in fish and amphibians. • The females lay the eggs in the water and ...
Chapter 46 - LBCC e
... Animal Reproduction Reproduction • sexual reproduction • Asexual reproduction Whose genes all come from one parent Mechanisms of Asexual Reproduction • Many invertebrates reproduce asexually by fission – The separation of a parent into two or more individuals of approximately the same size Asexual a ...
... Animal Reproduction Reproduction • sexual reproduction • Asexual reproduction Whose genes all come from one parent Mechanisms of Asexual Reproduction • Many invertebrates reproduce asexually by fission – The separation of a parent into two or more individuals of approximately the same size Asexual a ...
Black-and-white Ruffed Lemur: Size: Head and body 51
... Size: Head and body 44-63cm tall, 4-8kgs. In some species of gibbons the males and females are differently coloured. Lifespan: 25 years in the wild, 34 years in captivity. Babies: One young, occasionally twins. Gestation 230-235 days, no specific breeding season, maturity at 7 years. Females give bi ...
... Size: Head and body 44-63cm tall, 4-8kgs. In some species of gibbons the males and females are differently coloured. Lifespan: 25 years in the wild, 34 years in captivity. Babies: One young, occasionally twins. Gestation 230-235 days, no specific breeding season, maturity at 7 years. Females give bi ...
Advantages and Disadvantages of Asexual Reproduction
... cell membrane. As the cell grows and gets longer, the chromosomes move away from each other. When the cell is about twice its original size, it undergoes cytokinesis. The membrane pinches inward, and a new cell wall is laid down between the two chromosomes, which completes the separation into two da ...
... cell membrane. As the cell grows and gets longer, the chromosomes move away from each other. When the cell is about twice its original size, it undergoes cytokinesis. The membrane pinches inward, and a new cell wall is laid down between the two chromosomes, which completes the separation into two da ...
Reproductive suppression
Reproductive Suppression involves the prevention or inhibition of reproduction in otherwise healthy adult individuals. It includes delayed sexual maturation (puberty) or inhibition of sexual receptivity, facultatively increased interbirth interval through delayed or inhibited ovulation or spontaneous or induced abortion, abandonment of immature and dependent offspring, mate guarding, selective destruction and worker policing of eggs in some eusocial insects or cooperatively breeding birds, and infanticide (see also infanticide (zoology)), and infanticide in carnivores) of the offspring of subordinate females either by directly killing by dominant females or males in mammals or indirectly through the withholding of assistance with infant care in marmosets and some carnivores.The Reproductive Suppression Model argues that “females can optimize their lifetime reproductive success by suppressing reproduction when future [physical or social] conditions for the survival of offspring are likely to be greatly improved over present ones”. When intragroup competition (competition between individuals belonging to the same group) is high it may be beneficial to suppress the reproduction of others, and for subordinate females to suppress their own reproduction until a later time when social competition is reduced. This leads to reproductive skew within a social group, with some individuals having more offspring than others. The cost of reproductive suppression to the individual is lowest at the earliest stages of a reproductive event and reproductive suppression is often easiest to induce at the pre-ovulatory or earliest stages of pregnancy in mammals, and greatest after a birth. Therefore, neuroendocrine cues for assessing reproductive success should evolve to be reliable at early stages in the ovulatory cycle.Reproductive suppression occurs in its most extreme form in eusocial insects such as termites, hornets and bees and the mammalian naked mole rat which depend on a complex division of labor within the group for survival and in which specific genes, epigenetics and other factors are known to determine whether individuals will permanently be unable to breed or able to reach reproductive maturity under particular social conditions, and cooperatively breeding fish, birds and mammals in which a breeding pair depends on helpers whose reproduction is suppressed for the survival of their own offspring. In eusocial and cooperatively breeding animals most non-reproducing helpers engage in kin selection, enhancing their own inclusive fitness by ensuring the survival of offspring they are closely related to. Wolf packs suppress subordinate breeding.