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#Question id: 23072


_____________ bacterium can withstand the dosage of radiation, which are several times higher than what human cells can tolerate

#Unit 12. Applied Biology
  1. Escherichia coli
  2. Conus magus
  3. Deinococcus radiodurans
  4. Staphylococcus aureus
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TLS Online TPP Program

#Question id: 3582

#Unit 8. Inheritance Biology

Different genetic cross regarding two independently assorting non allelic gene with complete dominance and their phenotypic ratio showed in a following is correc

Genetic cross

Phenotype ratio

I

AABb X AaBb

A

1:1

II

AaBb X  aaBB   

B

3:3:1:1

III

Aabb X aaBb   

C

6:2 

IV

AaBb X Aabb   

D

1:1:1:1

TLS Online TPP Program

#Question id: 3583

#Unit 8. Inheritance Biology

In sesame plants, the one-pod condition (P) is dominant to the three-pod condition (p), and normal leaf (L) is dominant to wrinkled leaf (l). Pod type and leaf type are inherited independently. Determine the genotypes for the two parents for all possible cross producing the following offspring:

(a) 300 one-pod, normal leaf and 100 one-pod, wrinkled leaf

(b) 323 three-pod, normal leaf and 106 three-pod, wrinkled leaf

(c) 150 one-pod, normal leaf, 147 one-pod, wrinkled leaf, 51 three-pod, normal leaf, and 48 three-pod, wrinkled leaf

(d) 223 one-pod, normal leaf, 72 one-pod, wrinkled leaf, 76 three-pod, normal leaf, and 27 three-pod, wrinkled leaf

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#Question id: 3584

#Unit 8. Inheritance Biology

In a plant species, a segregating line (RR- Red, Rr- Pink and rr- white) that contains both homozygotes and heterozygotes at a locus can be made homozygous by repeated selfing for several generations. What is the proportional red flower in third generations of selfing, if the level of heterozygosity in generation '0' is denoted as 1?

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#Question id: 3585

#Unit 8. Inheritance Biology

Tryhybrid cross allowed between AaBbCc X AaBbCc, what is the proportional of following genotype, If all character follow independent assortment?

AaBbCc, Aabbcc, AabbCc, AABBcc, AABbCC    respectively

1.      8/64        2/64      4/64          1/64     2/64

2.       6/64        1/64      2/64          1/64     1/64

3.       6/64        2/64      4/64          1/64     2/64

4.         0            2/64      4/64          1/64         0

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#Question id: 3586

#Unit 8. Inheritance Biology

In watermelons, bitter fruit (B) is dominant over sweet fruit (b), and yellow spots (S) are dominant over no spots (s). The genes for these two characteristics assort independently. A homozygous plant that has bitter fruit and yellow spots is crossed with a homozygous plant that has sweet fruit and no spots. If an F1 plant is backcrossed with the bitter, yellow spotted parent, what phenotypes and proportions are expected in the offspring?

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#Question id: 3587

#Unit 8. Inheritance Biology

Short hair in rabbits (S) is dominant over long hair (s). The following crosses are carried out, producing the progeny shown.

A. short X short = Progeny ( 3 short and 1 long)

B- short  X long = Progeny  (1 short and 1 long )

What is possible genotypes of the parents of  cross A and cross B respectively