You cross wild type females and yellow wingless males (recessive) and you get 80

Question

You cross wild type females and yellow wingless males (recessive) and you get 800 normal wingless, 800 yellow normal wing, 50 wild type and 50 yellow wingless. What's going on? this is a test cross that is helping to show inheritance yellow and wingless are really co-dominant a crossing event occurred between the yellow and wingless genes a and c a, b, and c You plant some seeds thinking you are going to get all blue carnations, and you get a 9:3:4 ratio of blue to pink to white. blue and white are codominant; and BB yields blue; bb yields white; and Bb yields pink There are really two genes controlling color, and the ratios are: A_ B_ (blue) aaB_ (pink) and _ _ bb is white There are really two genes controlling color, and the ratios are: AABB(blue) aaB (pink) and A bb is white d. There are really two genes controlling color, and the ratios are: AAB ___ (blue) aaB _ (pink) and A_bb is white. There are really two genes controlling color, and the ratios are: A _ B _ (blue) AAbb_ (pink) and aaBB is white Out of 1024 fruit flies, 350 were EFG, , 340 were efg, 40 were eFG, 60 were Efg, , 55 were EFg, 60 were efG, 10 were EfG and 9 were eFg. What's going on? There were single crossovers between the e and f locus and the f and g locus, and double crossovers between the e, f, and g genes. The parents of the fruit flies were EeFfGg X eeffgg, and these were just random genotypes. The phenotypes have nothing to do with the genotypes in this case The gene order is EGF and egf. a and d The term for a marriage of close relatives such as first cousins is consangunous consanguineous consanguineous consanguineous none of the above

Explanation / Answer

Answer:

15). b. There are really two genes controlling colorm and the ratios are: A_B_ (blue), aaB_(pink) and _ _ bb is white

Explanation:

Recessive epistasis (9:3:4):

Recessive alleles at one locus (aa) mask the phenotypic expression of other gene locus (BB, Bb or bb) such epistasis is called recessive epistasis. The alleles of ‘B’ locus express themselves only when epistatic locus ‘A’ has dominant allele like AA or Aa. The phenotypic ratio is 9: 3: 4.

A_B_ = Blue

aaB_ = Pink

A_aa or aabb = White

16). e). a and d

Explanation:

EFG / efg

Parental combinations: EFG & efg

Single cross over between e & f = Efg & eFG

Single cross over between f & g = EFg & efG

Double cross over = EfG & eFg

17). b. Consanguineous

Explanation:

Option b, c & d are similar

Consanguineous means that the marriages between the people, who are the children of the same ancestros or of the same blood or origin

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