long acrocentric with gene A close to the centromere and chromosome 2 is a

Long acrocentric with gene a close to the centromere

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long acrocentric with gene A close to the centromere and chromosome 2 is a short metacentric with gene B close to the centromere. Complete the following diagrams and indicate the frequency of each pattern and each gamete type. Include the allele for each chromatid. Pattern 1 Pattern 2 Anaphase I ____50% ______ Frequency ____50% _______ Anaphase II 4 products of Meiosis (gametes) 12.5% 12.5% 12.5% 12.5% Frequency 12.5% 12.5% 12.5% 12.5% 25% 25% Frequency 25% 25% Overall Gametic frequency State the Law and the name of the Law that these diagrams illustrate. This illustrates Mendel’s law of Independent Assortment that says a pair of alleles on one chromosome segregates independently of the alleles on another chromosome AB ab Ab aB AB AB ab ab Ab Ab aB aB A A A A A A b B B B B B a a a a a a b b b B b b
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15. In poultry, a hen (female,F) with gold plumage is mated to a male (F) with silver plumage. The F1 are all silver and produced an F2 of silver males, and equal numbers of silver females and gold females. The reciprocal cross produced an F1 of gold females and silver males and F2 of silver M., gold M., silver F and gold F in equal numbers. Give an explanation for this and show the genotypes for both crosses (P, F1, F2) Hint: In birds the males are homogametic (ZZ) and the females are heterogametic (ZW). Use G for silver and g for gold. Explanation : one gene - two alleles, G(Silver) dominant, g (gold) recessive and Z-linked (or sex-linked) Original cross Z G Z G x Z g W Z G Z g X Z G W Z G Z G Z G Z g Z G W Z g W Silver M gold F silver M silver F Silver M silver F gold F Reciprocal cross Z g Z g x Z G W Z G Z g X Z g W Z G Z g Z g Z g Z G W Z g W Gold M silver F silver M gold F Silver M gold M silver F gold F 16 The normal American robin (strain A) lays blue eggs. There is a true breeding strain of robins that lays white eggs (strain B).
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  • Spring '11
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  • Gamete, Zb Zw

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