No, fishes do not have more chromosomes than humans. Both humans and many species of fishes have the same number of chromosomes, which is typically around 46 or 48. Some species of fishes, such as the Honda or goldfish, have specifically been bred to have more than 48 chromosomes.
However, if you look at the entire animal kingdom, the species that have the most chromosomes are frogs. Frogs typically have between 74 and 82 chromosomes, depending on the species. This can be seen as evidence of further evolution of the species.
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How many chromosomes does a fish have?
The number of chromosomes in a fish will depend on the species. Most fish species have between 40 and 200 chromosomes, however some can have as low as 12 chromosomes or as high as 450. For example, the Atlantic salmon (Salmo salar) has 192 chromosomes, while the Tsunoshima Wrasse (Thalassoma amblycephalus) has only 12 chromosomes.
How much human DNA is in a fish?
Generally speaking, there is very little if any human DNA present in any fish. While some distant genetic links may exist between humans and fish, due to our shared ancestry, the amount of DNA present in fish that has been passed down from humans would be extremely minimal.
Even in species of fish that share a closer evolutionary relationship with humans, such as the coelacanth and lungfishes, the amount of human DNA would still be negligible.
What animal has most chromosomes?
The animal that has the most chromosomes is the Brazilian wild tarantula (Allocyclosa bicolor). This species of tarantula has a grand total of 177 chromosomes, making it the animal with the highest chromosome count.
This species also has a very large genome size, around 2. 5 gigabases. To put that into perspective, the human genome size is only 3 gigabases. The high chromosome count may help this tarantula adapt more quickly to their environment, as they can more easily express features and traits specific to their needs.
Can a person have 50 chromosomes?
No, a person cannot have 50 chromosomes. Humans typically have 46 chromosomes, which is divided into 23 pairs. This number can vary, however, and some people may have an extra chromosome which is known as a chromosomal abnormality.
Common chromosomal abnormalities include Down syndrome, which is an extra copy of chromosome 21, and Klinefelter Syndrome, which is an extra copy of the X chromosome. Having an extra chromosome can result in physical and developmental delays, so it is important to seek medical advice if you suspect that you or your child might have a chromosomal abnormality.
What determines fish gender?
Fish gender is determined by a number of different factors depending on the species of fish. Generally, the presence of specific hormones is what determines gender, in the same way that it does in humans.
However, some species of fish also possess temperature-dependent sex determination, whereby the surrounding water temperature affects the balance between male and female ratios in the population. This is especially common in certain species of turtles and lizards, where the eggs of the female will hatch mostly males in cooler temperatures, and a balanced mix of males and females in warmer temperatures.
Furthermore, some species of fish, such as the goldfish, can actually change sex in response to changes in the social environment, such as competition for resources. This is known as sequential hermaphroditism, and the gender can change over multiple lifecycles.
Can you be XY and be a girl?
Yes, it is possible to be XY and be a girl. XY is the designation for a particular combination of sex chromosomes. In humans, this combination is generally considered male. However, in some cases, people who are XY may have reproductive organs and other physical characteristics that put them in the female category, specifically in cases of androgen insensitivity syndrome (AIS) and intersex conditions.
AIS is a condition that causes the body to be unable to respond to male sex hormones. People who have AIS are born with XY chromosomes, but the hormones do not masculinize their bodies, causing them to have physical traits more often associated with the female gender.
While someone with AIS may have a womb, the condition makes it impossible for them to become pregnant.
Intersex is an umbrella term used to refer to a variety of conditions in which a person’s reproductive organs and/or physical characteristics don’t fit the typical definitions of female or male. In such cases, an infant may have reproductive systems that have both female and male traits, or have external genitalia that look different from typical male or female parts.
Someone with intersex may have XXY chromosomes or an XX combination, but in some cases they may have XY. In such cases, they may be biologically male with female physical characteristics, or vice versa.
In summary, it is possible to be XY and be a girl, particularly in cases of AIS and certain intersex conditions.
What are the 6 types of sexes?
The six types of sexes, also known as the six categories of sex and sexuality, are gender identity, gender expression, biological sex, sexual orientation, romantic orientation, and intimate orientation.
Gender identity is a person’s sense of self as male, female, both, neither, or something else. Gender expression is how a person outwardly expresses their gender identity through clothing, hairstyle, mannerisms, and more.
Biological sex is determined by chromosomes, hormones, and physiology, and may be male, female, intersex, or something else. Sexual orientation is a person’s pattern of physical, emotional, or romantic attraction to another person, and may be heterosexual, homosexual, bisexual, or asexual.
Romantic orientation is a person’s pattern of romantic love and relationships, and may be homoromantic, biromantic, panromantic, or aromantic. Intimate orientation is a person’s capacity and preference for intimate connections with other people, and may be polyamorous, monogamous, or something else.
These six categories work together to define a person’s total sex and sexuality. None of them exist in isolation, and none of them are more important or valid than the others. All of them are equally valid, and must all be respected.
Is intersex a birth defect?
No, intersex is not considered a birth defect. Intersex is a term used to describe a naturally-occurring variation in an individual’s sex characteristics. This could include variations in the reproductive organs, hormones, or chromosomes.
Intersex conditions vary widely and may be caused by a range of factors. People with intersex variations do not have a “birth defect” or medical disorder but rather a naturally-occurring variation, like having red hair or being left-handed.
It is important to remember that intersex people are perfectly healthy and they have the same human rights as any other person.
How many intersex people in the world?
The exact number of intersex people in the world is difficult to determine due to a lack of research and the fact that some people do not publicly identify as intersex, or may not even know they are intersex.
It is estimated that around 1. 7% of the world’s population is intersex, which would be around 126 million people. This estimate is calculated using the same principles used in the World Health Organization’s calculation that around 1.
7% of the world’s population is born “with a discrepancy between the external genitals and the internal genitals (or gonads)”. However, this estimate does not take into consideration those who may have more subtle variations that may go undetected, or those who identify as intersex but are not publicly disclosing it.
Thus, the actual number of intersex people in the world may be significantly higher than the estimated 1. 7%.
What animal changes gender?
The most well-known animal that is able to change gender is the clownfish. Clownfish are native to warmer seas in the Pacific and Indian Oceans, and live in small groups within an anemone. These fish are sequential hermaphrodites; the dominant fish in the group is a female, and the males are the reproductively functional fish in the school.
If the dominant female dies, a male will change sexes and become the reproductive female within the group. This ability is also seen in other species, including wrasses, moray eels and other species of fish, as well as some species of coral, and animals such as certain species of sea slugs, sea turtles, crustaceans, and spiders.
