9. Individuals of genotypes AaBb were mated to individuals of genotype aabb. One thousand offspring were counted with the following results: • 474 Aabb, 480 aaBb, • 20 AaBb, 26 aabb a. What is the general term for this type of genetic cross (when a parent is mated with another that has all recessive traits)? b. Are these genes linked? c. If these genes are linked, identify the parental genotypes and the recombinant genotypes.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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9. Individuals of genotypes AaBb were mated to individuals of genotype aabb. One
thousand offspring were counted with the following results:
●
474 Aabb,
480 aaBb,
20 AaBb,
26 aabb
a. What is the general term for this type of genetic cross (when a parent is
mated with another that has all recessive traits)?
b. Are these genes linked?
c. If these genes are linked, identify the parental genotypes and the
recombinant genotypes.
d. If these genes are linked, how many map units apart are they?
e. Draw a chromosome map for the AaBb parent showing the position of the
genes, the appropriate alleles and the map distance between the genes.
f. Identify Mendel's Law that would be occurring if the genes are NOT linked.
Transcribed Image Text:9. Individuals of genotypes AaBb were mated to individuals of genotype aabb. One thousand offspring were counted with the following results: ● 474 Aabb, 480 aaBb, 20 AaBb, 26 aabb a. What is the general term for this type of genetic cross (when a parent is mated with another that has all recessive traits)? b. Are these genes linked? c. If these genes are linked, identify the parental genotypes and the recombinant genotypes. d. If these genes are linked, how many map units apart are they? e. Draw a chromosome map for the AaBb parent showing the position of the genes, the appropriate alleles and the map distance between the genes. f. Identify Mendel's Law that would be occurring if the genes are NOT linked.
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