RNA proofreading and backtrack in the prokaryotes is done by

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#Question id: 29107

#Unit 8. Inheritance Biology

Aneuploids may arise through nondisjunction, the failure of homologous chromosomes or sister chromatids to separate in meiosis. which of the following statements is correct?

a) Meiosis I non-disjunction leads to produce all gamete become aneuploidy

b) Meiosis II non-disjunction leads to produce half of gametes n+1 and n-1 while other half normal haploid

c) Either meiosis I or meiosis II non-disjunction leads to produce all aneuploidy gamete

d) Meiosis II non-disjunction leads to produce all gamete become n+1 and n-1

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#Question id: 29108

#Unit 8. Inheritance Biology

If 3 genes are unlinked which is X, Y and Z, the probability of progeny being X+ X-Y+Y- Z- Z- from a cross between  X+X+Y+Y-Z+Z- and X-X-Y+Y+Z-Z- parents will be____

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#Question id: 29109

#Unit 8. Inheritance Biology

If the probability of being blood types are;

Blood type A = 1/4

Blood type B = 3/4

Blood type O = 1/2

what is the probability of being either blood-type A  or blood-type B ?

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#Question id: 29110

#Unit 8. Inheritance Biology

When two parents heterozygous for albinism mate (Aa X Aa), the probability

of their having a child with albinism (aa) is 1/4 and the probability of having a child with normal pigmentation (AA or Aa) is 3/4 . What is the probability of this couple having 5 children, two with albinism and three with normal pigmentation?

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#Question id: 29111

#Unit 8. Inheritance Biology

A plant with purple flowers is crossed with a plant with white flowers, and the F1 are self-fertilized to produce 105 F2 progeny with purple flowers and 45 with white flowers.

A scientist hypothesized that there are two genes with identical functions that control the dominant trait. The scientist also proposed that the two genes are not linked. The scientist carried out a chi-square test to test the hypothesis. Which one of the following options is the correct chi-square value obtained by the scientist?

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#Question id: 29112

#Unit 8. Inheritance Biology

An example of multiple alleles is at a locus that determines the feather pattern of mallard ducks. One allele, M, produces the wild-type mallard pattern, MR, produces restricted, and a third allele, md, produces dusky. In this allelic series, dominancy shows MR >M > md

If a cross between  MR md X M md, What proportion of progeny will be restricted?