23. A karyotype can provide information A. changes to individual genes B. chromo

Question

23. A karyotype can provide information A. changes to individual genes B. chromosomal abnormaliis C. the method of D. 24. A breeder does a testcross and mates a brown la with a black la oa otype Black coat color is dominant. Five pups in the inter are biack What is is the most likely genotype of the parental black lab for this trant A BB B. Bb C bb D. 8 25. Phenylketonuria (PKU) is an example of impacts the ability for an individual to break down the amino acid phenyalanine also afe several other phenotypic traits because the one gene tha B. polygenic inheritance C. complete dominance D. pleiotropy 26. A homozygous purple flowered plant is crossed with a homozygous white fiowered plant Purple is dominant. For this one trait, what is the expected genotypic ratio for the F2(o generation)? A. 9:3:3:1 B. 3:1 D. 2:2 27. Who determined, through his work with pea plants, that each offspring receives one form a gene from each parent? A. Watson B. Mende C. Virchow D. Franklin

Explanation / Answer

(23) A.chromosomal abnormalities

A karyogram is an arrangement of all the chromosomes in an increasing size, it tells us about the abnormalities that could occur as a result of mutation/cell division

(24)B. Bb

Explanation:

Bb (black lab)x bb (brown lab)

Offsprings= Bb, Bb, bb,bb

Genotype= Bb

It cannot be BB or bb

(25)D.pleiotropy

(26)B.3:1

PP x pp

F1=Pp

F2=PpxPp

=PP, Pp, Pp, pp

3 purple and 1 white

(27)B. Mendel

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