Genetics

posted by .

In chickens, the Leghorn variety has white feathers due to an autosomal dominant allele. Silkies have white feathers due to recessive allele in a second gene. If true-breeding white leghorn is crossed to a true breeding white silkie, What is the expeected phenotype of the F1 generation? If member of the F1 generation are mated to each other, what is the expected phenotypic outcome of the F2 generations. Assumes that the parental generations are homozygous brown allele and the other is the homozzygous white allele. In subsequent generations, nonwhite birds will be brown.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Biology

    A cross between true breeding tall red flowered plants and true breeding short white flowered plants. Tall and red are dominant traits. What would be the expected ratios of phenotypes in the f1 and f2 generations?
  2. genetics

    can u help me with this qs pure breeding white budgies were crossed with pure breeding yellow and green budgies. all the F1 offspring were yellow and green. the F1 was then testcrossed with pure breeding white budgies, and the offspring …
  3. biology

    Hi there! I have this question for my bio/genetics homework, and I can't seem to figure it out. It reads, "A true-breeding red snapdragon is crossed to a true-breeding white snapdragon. The F1 progeny are all red. When the F1 is selfed, …
  4. biology genetics

    In Leghorn chickens, + stands for colored feathers and C represents white feathers. At an independently inherited gene, the allele + inhibits color expression, whereas I has no effect on color expression
  5. biology urgent

    In mice, a gene controlling coat colour has 2 alleles; B (black) and b (white). A pure breeding black mouse is crossed to a white mouse and all the offspring are black. The offspring are then crossed to white mice. The phenotypes of …
  6. Genetics part b only

    You are studying genetics in domestic chickens (Gallus gallus) and you find a mutant with no wings. Assume that the mutant wingless phenotype is due to a mutation at a single gene. In contrast to mammals, chickens use ZZ/ZW sex-linkage. …
  7. Biology

    "Quiglilies" are a rare variety of flower. They have one allele for orange petal colour O. They also have another allele for white petals W. These alleles have a co-dominant relationship producing a yellow petal colour. i) what are …
  8. Science

    How can an offspring inherit a recessive trait ?
  9. Genetics

    A pure-breeding white mouse with a long tail was crossed to pure-breeding pink mouse with a short tail. The F1 progeny were all pink with long tails. These F1 mice were test crossed to white mouse with a short tail. If the gene controlling …
  10. biology (genetics)

    A pure-breeding white mouse with a long tail was crossed to pure-breeding pink mouse with a short tail. The F1 progeny were all pink with long tails. These F1 mice were test crossed to white mouse with a short tail. If the gene controlling …

More Similar Questions