Question

need help with these questions please.

12: In the F2 generation of Mendel's monohybrid cross, the two heterozygous parent corn plants (Pp x Pp) produced offspring with the following genotypes e) PP (purple). Pp (purple). Pp(white). f) All purple g) All White h) All pink 15: A female fruit fly that is homozygous for white mutation will have the genotype a) W-w- b) Wºw c) W/W- d) W/Y 21: A father is heterozygous for the ability to roll the tongue. What gametes he can produce? a) T and T b) Tandt c) tandt d) TT and it 22: A woman who cannot roll her tongue (t) marries a man who can roll his tongue (TT) for the trait. What is the probability that they will have a child who cannot roll his/her tongue? a) All offspring can roll tongue b) No offspring can roll tongue c) Half offspring can roll and half cannot roll tongue d) 3 offspring can roll and 1 cannot roll tongue 27) The homologous chromosomes contain genes for the same traits. a) TRUE b) FALSE 31) Inheritance is the process of of characteristics from parents to offspring. a) gamete transmission b) protein transfer c) genetic transmission d) hereditary 34) ABO blood type is an example of what type of inheritance? a) sex-linked inheritance b) autosomal inheritance c) codominance d) incomplete dominance 35) Widow's peak is a) sex-linked inheritance b) autosomal inheritance c) codominance d) incomplete dominance 38) If PTC tasting produces bitter taste in mouth, it shows a) taster possesses dominant allele for PTC b) taster possesses recessive allele for PTC c) taster possesses incomplete dominance d) taster has codominance for PTC and non PTC

Answer 1

12. Answer-e) PP(purple), Pp (purple), pp(white)

As purple (P) is dominant over white (p) all heterozygotes(Pp) will be purple

Pp$\times$ Pp

	P	p
P	PP ( purple)	Pp (purple)
p	Pp (purple)	pp ( white)

PP(purple): Pp (purple): pp(white)

15. Answer- a) W^-/W^- (W⁺ denotes wild type phenotype while W^- denotes mutatant phenotype and as the fly is homozygous for white mutation genotype will be W^-/W^-).

21. b) T and t (As the father is heterozygous his genotype is Tt hence gametes are T and t).

22.a) All offspring can roll tongue

Woman- non tongue roller(tt) $\times$ Man- tongue roller(TT)

F1 Tt ( all tongue roller)

27. Answer - a)True ( Homologous chromosome pair contains one maternal and one paternal chromosome and they have same genes located at same loci in similar order)

31.c) Genetic transmission ( Inheritance or heredity is the transmission of genetic information from parents to offsprings).

34.Answer -c) codominance ( ABO blood group is an example of codominance because if allele A and B both are present they express equally and  blood group will be AB type).

35. Answer -b) Autosomal inheritance ( Genes associated with Widow's peak are present on autosomes hence its inheritance is autosomal).

38.Answer-a) Taster possesses dominant allele for PTC ( Tasters have dominant alleles(TT) and they taste PTC bitter while non taster (tt) do not taste anything for PTC)