A hen and rooster can both be homozygous for a recessive allele of a gene associated with neck feather length in roosters, but only the rooster will have long instead of short nect feathers. This is an example of a/an _____ A. Sex-influenced trait B. Sex-limited trait C. X-linked trait
Added by Christine J.
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Step 1: The trait is only expressed in males, so it is a sex-limited trait. Show more…
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Description Pattern of Influence In cows, the gene for milk production is carried by both males and females but is expressed only in females. The gene responsible for baldness in humans is B. A male is bald if he has the genotype BB or Bb. A female is only bald if she is homozygous BB. All male children in six generations have red-green color blindness, whereas only 5% of the female children are color blind. The genes responsible for most forms of color blindness are located on a sex chromosome. Males have heavy beard growth. Females will not exhibit heavy beard growth but can still pass the trait to their offspring. The color of larval skin of the Ephestia moth is controlled by allele A. Research has shown that the presence or absence of the pigment follows maternal lines and does not exhibit traditional Mendelian segregation. In one family, a father has X-linked recessive hemophilia. A geneticist tells the family it is likely their sons will have hemophilia and their daughters will be unaffected. Women are 3 times more likely to have migraines. Recent research has shown that migraines are autosomal dominant in females and autosomal recessive in males.
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In domestic chickens, some males display a plumage pattern called cock feathering. Other males and all females display a pattern called hen feathering. Cock feathering is an autosomal recessive trait that is exhibited in males only. What type of inheritance is exhibited by this trait? Sex-linked Sex-limited Sex-influenced
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Select the choices that describe sex-limited traits. Sheep, both females and males are horned. However, females with the hth genotype are hornless. Gene X causes prostate cancer and can be inherited by both males and females. A mother with normal vision, XCXc, has a son with color blindness. Both males and females can inherit a gene that causes polycystic ovary syndrome. Males who are heterozygous or homozygous dominant are bearded, but only homozygous-dominant women are bearded.
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