Homosexuality is romantic attraction, sexual attraction, or sexual behavior between members of the same sex or gender. As a sexual orientation, homosexuality is “an enduring pattern of emotional, romantic, and/or sexual attractions” to people of the same sex.
What species is homosexual?
In his day “the birds and the bees” generally meant only one thing—sex between a male and female. But, actually, some same-sex birds do do it. So do beetles, sheep, fruit bats, dolphins, and orangutans. Zoologists are discovering that homosexual and bisexual activity is not unknown within the animal kingdom.
What is the concordance rate of homosexuality in identical twins quizlet?
There is a 66% concordance rate of homosexuality among identical twins (monozygotic twins).
What is the biological basis of being male or female?
A person with XX chromosomes usually has female sex and reproductive organs, and is therefore usually assigned biologically female. A person with XY chromosomes usually has male sex and reproductive organs, and is therefore usually assigned biologically male.
When was homosexuality created?
In an 1868 letter to Karl Heinrich Ulrichs, the terms homosexual and heterosexual were coined by Karl-Maria Kertbeny and then published in two pamphlets in 1869. These became the standard terms when used by Richard von Krafft-Ebing in his Psychopathia Sexualis (1886).
What animals mate for pleasure?
It is often assumed that animals do not have sex for pleasure, or alternatively that humans, pigs, bonobos (and perhaps dolphins and one or two more species of primates) are the only species that do. This is sometimes stated as “animals mate only for reproduction”.
What is twin concordance?
Concordance as used in genetics usually means the presence of the same trait in both members of a pair of twins. However, the strict definition is the probability that a pair of individuals will both have a certain characteristic, given that one of the pair has the characteristic.
What is a concordance rate quizlet?
Concordance Rate. Indicates the percentage of twin pairs or other pairs of relatives who exhibit the same disorder. Twin Studies. Show that concordance rate is higher for identical twins than fraternal twins.
How many genders are there scientifically?
Thus, if one adds up these forms, the outcome is that in humans there are about 15 readily observable gender forms.
What are the 5 sexes?
In fact, she argues that there are five sexes that exist throughout the world. There are males, females, and intersexuals. However, the indication of “intersexual” in itself contains 3 subgroups. “Hermaphrodites”, “male pseudohermaphrodites”, and “female pseudohermaphrodites”.
What are the 6 common sexes?
- X – Female.
- XX – Female.
- XXY – Male.
- XY – Male.
- XYY – Male.
- XXXY – Male.
Who was the first LGBTQ Disney character?
First ‘Exclusively Gay Moment:’ LeFou in ‘Beauty and the Beast’ (2017) When this live-action remake came out, Disney touted LeFou (played by Josh Gad) as being their first gay character and even said that he had an “exclusively gay moment” in the film.
When did homosexuality become legal in England?
In 1967 the Sexual Offences Act was passed which decriminalised private homosexual acts between men aged over 21, while at the same time imposing heavier penalties on street offences.
What does MZ twins mean?
Monozygotic (MZ) twins, also called identical twins, occur when a single egg cell is fertilized by a single sperm cell. The resulting zygote splits into two very early in development, leading to the formation of two separate embryos. MZ twins occur in 3 to 4 per 1,000 births worldwide.
Which disorder has the highest concordance rate?
The highest concordance rates were found in anxiety disorders and major depression. The lowest concordance rates were found in dysthymic disorder and schizophrenia.
Is schizophrenia inherited?
Schizophrenia tends to run in families, but no single gene is thought to be responsible. It’s more likely that different combinations of genes make people more vulnerable to the condition. However, having these genes does not necessarily mean you’ll develop schizophrenia.
What are some of the common consequences to a child whose mother drank a lot of alcohol while pregnant quizlet?
Birth defects. Vision problems and hearing loss are common. Seizures and other neurologic problems, such as learning disabilities, and poor balance and coordination.
What is the problem of paternity uncertainty?
What is the problem of paternity uncertainty? Males can never be sure that they are the father of their offspring.
What is concordance rate psychology?
Concordance rates means the. probability of one twin having the disorder if the other already has it expressed as a percentage. In a twin study, MZ (identical) and DZ (non-identical) twins are compared.
When did cisgender become a thing?
While transgender dates to at least 1970, cisgender is a child of the 1990s: our evidence dates it back as far as 1994. It got its first element from a prefix that means “on this side,” from the Latin cis or citra, which has the same meaning.
Can DNA tell if you are male or female?
The simplest thing DNA can tell you is whether someone is male or female. Apart from some very rare cases, that doesn’t even involve looking at their DNA sequence – all you need to know is whether they have X and Y chromosomes (making them male) or a pair of Xs (which makes them female).
Where did cisgender come from?
History. The term cisgender was coined in 1994 in a Usenet newsgroup about transgender topics. German sexologist Volkmar Sigusch used the neologism cissexual (zissexuell in German) in his 1998 essay “The Neosexual Revolution”.
How are intersex born?
The person has the chromosomes of a woman, the ovaries of a woman, but external (outside) genitals that appear male. This most often is the result of a female fetus having been exposed to excess male hormones before birth.
Is intersex a birth defect?
Intersex variations are not abnormal and should not be seen as ‘birth defects’; they are natural biological variations and occur in up to 1.7 per cent of all births. Most people with intersex variations are not born with atypical genitalia, however this is common for certain intersex variations.
How many genders are there in the world?
There are many different gender identities, including male, female, transgender, gender neutral, non-binary, agender, pangender, genderqueer, two-spirit, third gender, and all, none or a combination of these.