Homework SourseDetermine whether the following scenarios are sexlinked sexl
Solution
Sex – Limited
Sex - Influenced
Sex- Linked
A women whose father has extremely heavy beard does not have any facial hair, Her son, however, has a heavy beard like his grandfather
Pattern bladness occurs in males with just one copy of the baldness gene. Females, however, will only express the baldness gene if homozygous for the autosomal gene.
Color blindess is more common on males than females as males are hemizygous and will express the mutant X chromosome gene with just one copy.
Pattern bladness occurs in males with just one copy of the baldness gene. Females, however, will only express the baldness gene if homozygous for the autosomal gene.
Presence of a beard on some goats is determined by an autosomal gene (Bb). Male goats with the genotypes B+Bb and BbBb have beards, while males with the genotype B+B+ are beardless. Female goats are only bearded if they are homozygous recessive for the Bb genes
A women with congenital generlized hypertrichosis, an X-linked dominant disorder, has only patchy hairness, while her brother with the same condition is covered head to toe with hair.
Unilateral or bilateral cryptorchidism, in which one or both testicles cannot be found in their usual position in the scrotum. Since \"Mom\" has no testicles, she cannot be a cryptorchid - but she can carry the gene(s) for cryptorchidism, and pass them to her sons.
Rooster have a larger comb and wattles and longer neck and tail feathers than do hens. These features may be found in roosters but never in normal hens.
Tortoiseshell fur pattern in cats is determined primarily by the gene for coat color located on the X Chromosome. The orange gene (XO) and the black gene (XB) are codominantly expressed.
| Sex – Limited | Sex - Influenced | Sex- Linked |
| A women whose father has extremely heavy beard does not have any facial hair, Her son, however, has a heavy beard like his grandfather | Pattern bladness occurs in males with just one copy of the baldness gene. Females, however, will only express the baldness gene if homozygous for the autosomal gene. | Color blindess is more common on males than females as males are hemizygous and will express the mutant X chromosome gene with just one copy. |
| Pattern bladness occurs in males with just one copy of the baldness gene. Females, however, will only express the baldness gene if homozygous for the autosomal gene. | Presence of a beard on some goats is determined by an autosomal gene (Bb). Male goats with the genotypes B+Bb and BbBb have beards, while males with the genotype B+B+ are beardless. Female goats are only bearded if they are homozygous recessive for the Bb genes | A women with congenital generlized hypertrichosis, an X-linked dominant disorder, has only patchy hairness, while her brother with the same condition is covered head to toe with hair. |
| Unilateral or bilateral cryptorchidism, in which one or both testicles cannot be found in their usual position in the scrotum. Since \"Mom\" has no testicles, she cannot be a cryptorchid - but she can carry the gene(s) for cryptorchidism, and pass them to her sons. | Rooster have a larger comb and wattles and longer neck and tail feathers than do hens. These features may be found in roosters but never in normal hens. | Tortoiseshell fur pattern in cats is determined primarily by the gene for coat color located on the X Chromosome. The orange gene (XO) and the black gene (XB) are codominantly expressed. |
