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21 Jul 2019

Codominance:

In some breeds of chickens, black feathers and white feathers are both dominant genes and heterozygous individuals appear checkered with black and white feathers. If a checkered is crossed with a white feathered chicken, what are the possible genotypes and phenotypes of their offspring? Please include the allele codes and a punnet square.

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Jarrod RobelLv2

23 Jul 2019

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Related questions

1. In chickens, black feathers (B)and white feathers (W) show incomplete dominance such that achicken with both the black and white alleles (BW) has grayfeathers. What types of offspring, and in what proportions,would you expect from a mating of a gray rooster and a blackhen?

2. What are the possible genotypes for aman with A blood type?

3. What are the possible genotypes for aman with B blood type?

4. What are the possible genotypes for aman with AB blood type?

5. What are the possible genotypes for aman with O blood type?

6. A child has type O blood and its motherhas type A blood. What are ALL thepossible blood types of the father?

7. A child has type B blood and its motherhas type AB blood. What are ALL the possible blood types of thefather?

8. In Labrador retrievers dogs can haveblack, yellow or chocolate fur. This is due to

a) codominance

b) the interaction of 2 different genes

c) incomplete dominance

d) environmental influence

skywasp513

1. A dominant gene (H) produces wire-haired texture in dogs; its recessive allele (h) produces smooth hair. Two heterozygous wire-haired individuals were crossed and their F1 progeny testcrossed. Determine the expected genotype and phenotype rations among the testcross progeny. Note: in a testcross, an individual with an unknown genotype is crossed with a homozygous recessive individual.

2. A white guinea pig, whose parents were black, is closed with a black guinea pig whose male parent was white and whose female parent was black. Two white offspring result. Determine the genotypes of all individuals mentioned. About which individuals is there some doubt?

amethystwhale496

) A metallic blue-colored Indian blue peahen with long pinion feathers is crossed with a dull brown-colored Indian blue peacock with short pinion feathers. Half of the resulting peacocks are metallic blue with short pinions and half the resulting peacocks are metallic blue with long pinions. Half of the resulting peahens are dull brown with short pinions and half the peahens are dull brown with long pinions. Long pinions are the result of a functional protein. A) Which gene is sex-linked? B) What are the genotypes of each parent and each type of offspring?

Sorry for the long question but I was told two different ways to this. Which one is correct

First way

Genotypes for parents -

A metallic blue-colored Indian blue peahen with long pinion feathers = BbLl (BL, Bl, bL, bl)

Dull brown-colored Indian blue peacock with short pinion feathers = bbll (bl, bl, bl, bl)

BLbl

BbLl

Blbl

Bbll

bLbl

bbLl

blbl

bbll

Genotypes for offspring =

Metallic blue with long pionion feathers = BbLl

Metallic blue with short pioion feathers = Bbll

Dull brown with long pionion feathers = bbLl

Dull brown with with short pioion feathers = bbll

Should you include if it is a peahen or peacock?

No genes are sex-linked. It follows Mendelâs Law of Independent Assortment, which says âthat separate genes for separate traits are passed independently of one another from parents to offspring.â

Second way - if this is correct how do you do the punnett table and which gene is sex linked.

Another way I was told to do this is

Bull brown (B) is dominant over blue (b)

Long pinion (L) is dominant ove short (l)

Genotypes for parents -

A metallic blue-colored Indian blue peahen with long pinion feathers = xbxb, Ll

Dull brown-colored Indian blue peacock with short pinion feathers = xby, ll

Peahen xbxb, Ll

Peacock xby, ll

Determine whether either of the genes are sex-linked. For this type of a question, if you arenât told, then the thing for which to look is whether when looking only at the offspring one of the phenotypes sorts out by sex. NOTE: if you are dealing with a species that doesnât have sex chromosomes (e.g. bees, wasps, most reptiles), you canât have a sex-linked trait. Are birds reptiles or mammals?

Thank you Please do punnett table and explain what is sex linked gene if the second way is correct. Sorry again for the long post.

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