Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
HH alleles are ________________ genotype.

Transcribed Image Text:Phenotype and Genotype
Phenotypes
(observed traits)
Genotypes (alleles of gene)
Homozygous dominant (RR)
arinkled seed phenotypes. Notice that the
dominant allele, if present, is written first.
Round
Heterozygous (Rr)
bni bols
A round seed can have two genotypes-RR
and Rr. Both genotypes have a round
Homozygous recessive (rr)
This is because the round allele (R) is dominant
Wrinkled
to the wrinkled allele (r)
A wrinkled seed has the recessive genotype,
r The wrinkled-seed phenotype is possible
only when the same two recessive alleles (rr.
are present in the genotype.
Homozygous and Heterozygous When
the two alleles of a gene are the same, its
genotype is homozygous (hoh muh ZI gus).
Both RR and rr are homozygous genotypes, as
shown in the figure.
If the two alleles of a gene are different, its
genotype is heterozygous (he tuh roh ZI gus).
Rr is a heterozygous genotype.
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