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13 Jun 2018

The following multi-hybrid cross is made:

Aa BB Câ²C Dd Eâ²Eâ² ff Gâ²G X Aa Bb Câ²C dd Eâ²Eâ² Ff Gâ²G.

Note that the genes A, B, D, and F exhibit complete dominance (represented with capital and lower case letters), and the genes C, E, and G exhibit semidominance (aka intermediate dominance) represented with alleles with capital letters and a prime symbol.

(a) How many different genotypes might you expect to get in the offspring? (Enter your answer as a number)

(b) How many different phenotypes might you expect to get in the offspring? (Enter your answer as a number).

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Jean KeelingLv2

14 Jun 2018

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Related questions

Questions 9-15 are related. The drosophila alleles for purpleeyes (instead of red) and dumpy wings (instead of normal) are bothrecessive. Gene âEâ designates eye color (E: dominant, e:recessive), and gene âDâ designates wing shape (D: dominant, d:recessive). You cross a pure breeding purple eyed, normal wingedfly to a true breeding red eyed, dumpy winged fly.

9. What are the genotypes of the parental flies? (select allthat apply)

eedd

10. What would you expect the offspring (F1) phenotypes tobe?

All purple eyed, dumpy winged

All red eyed, normal winged

All purple eyed, normal winged

All red eyed, dumpy winged

Half purple eyed normal winged, half red eyed dumpy winged

Half red eyed normal winged, half purple eyed dumpy winged

None of the above

11. You cross these F1 offspring to flies that are pure breedingfor purple eyes and dumpy wings. You get 200 offspring. 45 arepurple eyed and dumpy winged, 43 are red eyed and normal winged, 63are purple eyed and normal winged, and 49 are red eyed and dumpywinged. You think that these two genes could be on differentchromosomes but your friend tells you that he thinks they arelinked and that they are close enough to each other to have afrequency of recombinants of 0.38. If you are correct and they areon different chromosomes, how many purple eyed, normal winged flieswould you ideally expect out of your 200 offspring? Youranswer should be a whole number.

12. If your friend is correct and the genes are linked withfrequency of recombinants of 0.38 how many purple eyed, normalwinged flies would you expect? Your answer should be awhole number

azuremacaw550

1.) This summer, there was a surge in the number of albino children killed for their body parts in the African country of Malawi (yes, it's bizarre but sadly true: http://goo.gl/8o0imm and http://goo.gl/DK0r8M). Albinism in humans is inherited as a simple recessive trait. Assuming that two non-albino (normal) parents have five children, four of which are normal and one of which is albino, which of the following statements is true? Select all that apply (you must select all correct answers to get credit). Assume that 'A' indicates the non-albino allele and 'a' indicates the albino allele.

Multiple answers:You can select more than one option

A)The 4 normal children are heterozygous Aa

B)At least one of the normal siblings must be homozygous AA

C)The frequency of albino children is as expected for Mendelian inheritance

D)One of the parents cannot be Aa

E)One third of the normal children expected to be AA while the others Aa

2.)

Albinism in humans is inherited as a simple recessive trait. Assuming that a normal male and an albino female have 6 children, all normal, which of the following statements is true? Select all that apply (you must select all correct answers to get credit).

Multiple answers:You can select more than one option

A)The father could be heterzygous for the trait

B)The probability that all the children are heterozygous for the trait is (1/2)^5 = 1/32

C)The father cannot be Aa

D)The children should all be heterozygous for the trait

E)One would expect about 2/3 of the normal children to be Aa

F)The father must be AA

3.)

Given an albino male mating with a normal female to produce 3 normal children and 3 albino children, which of the following of Mendel's postulates are not being demonstrated by this particular scenario? Select all that apply (to get credit, all your choices must be correct).

Multiple answers:You can select more than one option

A)Postulate of segregation

B)Postulate of dominance

C)Postulate of independent assortment

D)Postulate of unit factors

4.)

Consider the cross: Ee ff Gg HH x Ee Ff gg HH (assume these are designations for genes that are inherited in a Mendelian fashion). What is the probability that a single offspring from this cross would be genotypically: ee Ff Gg HH or Ee ff gg HH?

A)1/16

B)1/32

C)9/64

D)1/6

E)3/16

F)27/64

G)1/64

H)3/64

I)1/8

J)3/8

The drosophila alleles for black body (instead of the normal tancolor, which is the wild type) and curved wings (instead of thewild-type straight wings) are both recessive and on chromosome 2.Gene âCâ designates color, with alleles C representing the dominanttan allele and c representing the recessive black allele, whilegene âWâ designates the wing shape gene with W being the dominantstraight allele and w the recessive curved allele. You need todiscover how close together these two genes are on chromosome 2.You place one male from a pure breeding stock and one female from apure breeding stock (these are the âparentalâ or âgeneration zeroâ(G0) flies) into vial 1. The offspring of this cross (cross 1)hatch in vial 1. These offspring (Generation 1, G1) areheterozygous for both genes. You perform the cross from the abovequestion and get 500 offspring in vial 2 (these are the G2 flies).Among these G2 flies, 65 have tan bodies and curved wings, 70 haveblack bodies and straight wings, 190 have black bodies and curvedwings, and 175 have tan bodies and straight wings. What are thegenotypes of offspring with parental phenotypes? What are thegenotypes of the recombinant offspring? wo true breedingparents (G0) gave rise to the doubly heterozygous (G1) flies invial 1. What were the genotypes of these parents? Whatis the percent of recombinants for these two genes? Ifthe two genes were actually on different chromosomes, whatphenotypic distribution would you expect in the G2 flies (insteadof 65 tan curved, 70 black straight, 190 black curved, and 175 tanstraight)? If the two genes were actually on differentchromosomes and you crossed the heterozygous flies to each other(did a self cross) what phenotypic distribution would you expectfrom the offspring?