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sex in Biological Dictionary

Y chromosome

...,000 to 1 in 3,000 males ... Y-chromosome or Y chromosome ( ) n. The sex chromosome associated with male characteristics in mammals, not occurring...Chromosome Genetic Data, and ... The Y chromosome is one of the two sex chromosomes in humans and most other mammals. ... In humans, the Y chr...

X chromosome

...... X-chromosome or X chromosome ( ) n. The sex chromosome associated with female characteristic...le in Y-chromosome or Y chromosome ( ) n. The sex chromosome associated with male ... The X chr...ly more genes than the Y, which has its ... The sex chromosomes raise an interesting dilemma: female...

Vagina

... pregnancy, sexual health, and mature women ... The vagina also includes numerous tiny glands that make ... The vagina is the female internal sex organ that begins on the outside at the vaginal opening and extends about three to five inches inside, ending at the cervix. Objects placed in th...

Uterus

... The uterus is a major female hormone-responsive reproductive sex organ of most mammals, including humans. It is within the uterus that the foetus develops during gestation. The term uterus is used consistently...

Syngamy

... syngamy or the fusion of two different gametes. ... fit than themselves when syngamy results in recessive homozygotes. ... ... anatomy and sex lives (they don't have syngamy or meiosis or even true mitosis) ... Without water, algal syngamy is impossible, and gametes and embryos have n...

Synapse

...ondary school students and teachers who are interested in learning about the nervous system and brain with hands on activities, ... Panik House's sex & FURY - Available again soon! Checkout The Complete Synapse Collections! ... with Cast and Crew. More Synapse Films titles now available on ....

Spermatogenesis

... and spermatogenesis . ... Spermatogenesis is the process of producing sperm with half the number of ... Spermatogenesis occurs in medullary sex cords which are called seminiferous ... Definition of spermatogenesis from the Merriam-Webster Online Dictionary with audio pronunciations, thesa...

Sperm cells

...ake up only about 3% of the volume of semen, a fluid ... Mature sperm cells are about 0.05 millimetres long, and are made up of a head, ... The sex cells , sperm and ova, are produced by meiosis in special tissues of male ... The number of sperm cells produced can be significantly diminis...

Sexual

... have a sexual ... A sexual problem means that sex is not satisfying or ... Certain medicines that ca... behavior of a person who has an unusually intense sex drive or obsession with sex. sexual adj. Of, ...haracteristic of sex, sexuality, the sexes, or the sex organs and their functions sexual harassment ...

Sex-linked

... sex linkage is the phenotypic expression of an allele that is related to the chromosomal sex of the individual. This mode of inheritance is ...essing the... Genes that are carried by either sex chromosome are said to be ...

Sex chromosome

... A sex -determination system is a biological system that ... sexual organisms have two sexes. In many cases, sex determination is genetic: males and females have ...ifferent alleles or even different... The XY sex -determination system is the ...

Sex chromosomes

... A sex -determination system is a biological system that ... sexual organisms have two sexes. In many cases, sex determination is genetic: males and females have ...ifferent alleles or even different... The XY sex -determination system is the ...

Sex cells

...o not have a germ line set aside in early... sex cell n. A germ ... sex cells have only half the number of chromosomes that other cells ... sex cell unites with a female ...

Sequence similarity

...ith-Waterman algorithm. ScanPS (EBI) ... ... one example of homology. In evolutionary biology , homology refers to any similarity between ... sex chromosomes have a shorter region of sequence similarity . ... for correcting similarity scores for library- sequence length was evaluated ...

Sequential Epitope

... - competent - complementary - conformational epitope - congenital ... tagged site - sequential epitope - severe combined immunodeficiency - sex ... ... differs markedly from T cell epitope spreading that follows a sequential cascade. ... They further demonstrate that the epitope MOG...

Segregation

...mean the practice of ... De jure segregation means racial separation forced by ... Information about segregation in the free online English ... sex segregation , purdah - the traditional Hindu or Muslim system of keeping women secluded ... Exhibition Overview: On May 17, l954, the Supreme Cour...

Secondary oocyte

...uple ... Encyclopedia article of oocyte at Reference.com compiled from comprehensive ... The only normal human type of secondary oocyte has sex chromosomes 23,X (where ... ...

Reciprocal cross

...rocal cross is a breeding experiment designed to test the role of parental sex on a given inheritance pattern . All parent organisms must be true breedi...ciprocal cross . In genetics, a genetic cross of two genotypes in which sex influences the ... Definition of reciprocal from the Merriam-Webster O...

Recessive

...bster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. Sex-linked diseases are inherited through one of the sex chromosomes -- the X or ... Autosomal recessive . Chromosome. Gene. Genetic counseling and prenatal diagnosis ... ... recessive ... Autosomal ...

Pseudoautosomal regions

...... The pseudoautosomal regions of the human sex chromosomes. Hum Genet. 1993;92:315–324. ... TH...ion of the pseudoautosomal regions of human sex chromosomes. The Human Pseudoautosomal Regions ...93) The pseudoautosomal regions of the human sex chromosomes. ... ... in the...

Pollen grain

...ation, transfer of pollen grains from the male structure of a plant to the ... The pollen grains contain cells that will develop into male sex cells, or sperm. ... The pollen grain with its hard coat protects the sperm cells during the process ... The smallest pollen grain , tha...

Oxygen

...he shallow decompression stops at the end ... Madeline Foster (Maura Tierney) is an NYPD detective with a drinking problem and a penchant for rough sex in this police thriller that has her investigating the... Oxygen (IPA: /ˈɒksidʒən/) is a chemical element with the chemical symbol O and ... At s...

Nutrition

...rts nutrition , vegan, definition, ... Learn about nutrition , diet and healthy eating with our tips. ... 6 Nutrition Strategies for a Stronger sex Drive ... More On Nutrition . Quiz: What's Your ... The American Dietetic Association is the world's largest organization of food and nutrition ...

Multigenic disorder

... and ordinary mood swings? ... Numerous genetic variations have been shown to affect disease ... complex multigenic disorders with considerable sex differences in frequency and presentation. ... Multigenic disorders are the next great frontier of medical genetics, but ... is one of the few ...

MtDNA

...in the area of molecular genealogy Tuesday, I referred to mtDNA and sperm evolution. ... There has been recent interest in the coinheritance of sex chromosomes and mtDNA . ... ...

Monoecious

...an, monoecious cucumber is very popular, and there are commercial ... Therefore, a selectable marker is needed to enhance breeding of monoecious sex phenotypes. ... monoecious . adjective (Gr. monos: single; oikos: house) Describing plant species ... examples of monoecious plants are maiz...

Mendelian inheritance

...that ... The premise in autosomal dominant inheritance is that an individual who carries ... Mendelian inheritance . Alleles: What are they? sex ... Online Mendelian Inheritance in Man: a professional physician's reference on inherited diseases ... Principles of Mendelian Inheritance ...

Mating system

...es are in this category, out ... Monogamy is the most common avian mating system ... Ecological Factors in Sandpiper Mating System . • Adult sex ratio biased towards males ... ''Shuster and Wade place the study of animal mating systems and alternative mating strategies in a comprehen...

Lampbrush

... in the Online Dictionary. Meaning of lampbrush chromosome. ... XX and ZW sex lampbrush chromosomes in Rana rugosa females. ... ... by 24-48 h res...osome in Free online English dictionary. ... differences between XX and ZW sex lampbrush chromosomes in Rana rugosa females. ... Electron micrograp...

Karyotype

...roscope. ... In a karyotype , the chromosomes can look bent or twisted. ... karyotype , chromosomes, intersex, hermaphrordite, DSD, Disorder of sex development, hermaphrodism, intersexuality, intersexual, intersexed, intergender Karyotype - Definition of Karyotype at Dictionary.com a free o...

Host strain

...1 • BLR • HMS174 • NovaBlue • NovaF ... NovaF- is a K-12 strain ideally suited as a cloning host due to its high ... Host strain specific sex pheromone variation in Spodoptera frugiperda ... The two host strains of S. frugiperda produce systematically differing female ... The host ...

Hormones

... gland. An important component in the synthesis of thyroid hormones is iodine. The major form of thyroid... ... "the gradual decline of important sex hormones , especially testosterone. ... Rebuttal to Attack Against Bioidentical Hormones ... Hormones | Macmillan Animal Sciences. Hormones ...

Homologous chromosomes

...ok alike. ... Homologous chromosomes separating in the production of sex cells ... While homologous pairs of chromosomes are independently ass... chromosomes and thus govern the same trait. ... All autosomes and the sex chromosomes of females occur in homologous pairs. ... Homologous ...

Homologous chromosome

...s occurs when homologous chromosome pairs line up during Metaphase I of Meiosis. ... Homologous chromosomes separating in the production of sex cells. Which chromosome from each of the 23 homologous pairs of both parents is ... Homologous chromosomes are a matching pair of chromoso...

Hermaphrodite

...and a pussy! Hermaphrodite does a girl. 8 min sex rated 91% Shemale Hermafrodita Babeyondi ... Hermaphrodite Fucks a Guy. 9 min sex rated 87% sex Tranny Herma. 11 min...

Haploid Cell

... ... one set derived from each parent), but sex cells (sperm and egg) are haploid . ... a di...Online.org ... in one parent's gamete ( haploid sex cell ) to produce 47 chromosome offspring wit...ologous chromosomes, but we also contain haploid sex cells with one set and half the number. ... d...

Haploid

...ic cells that compose the body are diploid, but sex cells (sperm and egg) are haploid . In contrast... haploid number. DNA (deoxyribonucleic acid ) ... sex cells are produced by the meiosis process and ...ells are often used in sexual reproduction. ... sex cells, however, are haploid – they have only one...

Gonads

...eproductive system and ultimately forms the testes Gonads are the true sex organs, generating reproductive gametes containing ... The absence of it ...... Men's gonads are called the testes, which produce sperm and male sex hormones. Abnormal function of the gonads can cause strong or weak sexua...

Genetic variance

...riance , but they are often considered ... Liberating genetic variance through sex. Peters AD, Otto SP. ... alleles (epistasis) are positive, sex can reduce genetic variance in fitness. ... In summary, genetic variance , except for grain yield, was lost during advanced ... Expected Ge...

Gene splicing

...n extension of conventional plant breeding ... intron usually contains a clear signal for splicing (e.g., the beta globin gene ) ... g., the sex lethal gene of fruit fly), a splicing signal may be masked ... Alternative gene transcript splicing has increasingly become more common-f...
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