homogametic वाक्य
उदाहरण वाक्य
मोबाइल
- Males are the homogametic sex ( ZZ ), while females are the heterogametic sex ( ZW ).
- Many butterflies are ZW sex-determination system where females are the heterogametic sex ( ZW ) and males homogametic ( ZZ ).
- Thus, heterogametic male organisms with one X chromosome may match the level of expression achieved in homogametic females with two active X chromosomes.
- The homogametic sex ( females in humans ) receive two of each sex chromosome and therefore need to be homozygous to show a recessive trait.
- This could cause the heterogametic sex chromosome in the hybrid to be inviable or sterile, but homogametic sex chromosome will be fertile ( Futuyma 1997 ).
- In ZW sex-determination system used by birds the opposite is true : the male is the homogametic sex ( ZZ ), and the female is heterogametic ( ZW ).
- In mammals, the female is homogametic, with two X chromosomes ( XX ), while the male is the heterogametic sex, with one X and one Y chromosome ( XY ).
- However, in birds, and some reptiles, males have two Z sex chromosomes and so are the homogametic sex, while females, with one Z and one W chromosome, are the heterogametic sex.
- Birds and many insects have a similar system of sex determination ( " ZW sex-determination system " ), in which it is the females that are heterogametic ( ZW ), while males are homogametic ( ZZ ).
- For example, in humans, males, with an Y sex chromosome, would be referred to as the heterogametic sex, and females having two X sex chromosomes would be referred to as the "'homogametic sex " '.
- Regardless of their ambiguous evolutionary history, platypuses have been empirically determined to follow an XY sex-determination system, with females possessing five pairs of X chromosomes as the homogametic sex, and males possessing five X and five Y chromosomes as the heterogametic sex.
- :: That's not correct, since birds have no Y chromosome, and it is the male that is homogametic ( ZZ ) and the female that is heterogametic ( WZ )-the opposite of human sex determination .-Nunh-huh 19 : 59, 3 May 2007 ( UTC)
- One logical way to equalize gene expression amongst males and females that follow a XX / XY sex differentiation scheme would be to decrease or altogether eliminate the expression of one of the X chromosomes in an XX, or female, homogametic individual, such that both males and females then express only one X chromosome.
- If dioecious organisms are heterogametic and the gene locus is located on the X chromosome, it can be shown that if the allele frequencies are initially unequal in the two sexes [ " e . g " ., XX females and XY males, as in humans ], in the heterogametic sex chases in the homogametic sex of the previous generation, until an equilibrium is reached at the weighted average of the two initial frequencies.
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