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Zorluk: KolaySex Determination and Sex-Linked Traits

Match each sex determination mechanism or sex-linked trait concept on the left with its corresponding biological description on the right.

  • XX-XY determination mechanismSex determination system where males are heterogametic (XY) and females are homogametic (XX).
  • ZZ-ZW determination mechanismSex determination system where females are heterogametic (ZW) and males are homogametic (ZZ).
  • Haemophilia inheritanceX-linked recessive trait resulting in impaired blood clotting, where males express the phenotype from a single mutant allele.
  • Holandric traitsY-linked traits transmitted exclusively along the paternal line from father to all sons.

Cevap

XX-XY determination mechanism corresponds to the system with heterogametic males (XY); ZZ-ZW determination mechanism corresponds to the system with heterogametic females (ZW); Haemophilia inheritance corresponds to the X-linked recessive blood-clotting disorder; Holandric traits correspond to Y-linked traits passed exclusively from father to son.
Each concept is correctly paired with its biological definition: XX-XY features heterogametic males; ZZ-ZW features heterogametic females; Haemophilia is an X-linked recessive disorder impairing blood clotting; and Holandric traits are Y-linked traits inherited strictly from father to son.

Adım Adım Çözüm

1
Identify the chromosomal composition of heterogametic and homogametic sexes in different organisms.
In XX-XY systems (mammals), males are heterogametic (XY). In ZZ-ZW systems (birds), females are heterogametic (ZW).
The heterogametic sex produces two different types of gametes that determine the offspring's sex.
2
Examine the inheritance pattern of Haemophilia.
Haemophilia is an X-linked recessive trait that affects blood coagulation and is primarily expressed in males.
Males receive their single X chromosome from their mother, so a recessive allele on the X chromosome will always be expressed.
3
Examine the inheritance pattern of Holandric traits.
Holandric traits are Y-linked traits passed directly from fathers to all male offspring.
Only males inherit the Y chromosome, ensuring strict paternal transmission.

Anahtar Kavram

Sex Determination Mechanisms and Sex-Linked Inheritance Patterns
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Konular

Sex Determination and Sex-Linked Traits

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