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the genetic makeup of an organism is called its _____ and the physical traits of an organism are called its ___________
genotype, phenotype
which of the Mendel's laws is represented by each statement?
A. Alleles of each homologous pair separate independently during gamete formation
B. alleles segregate during gamete formation; fertilization creates pairs of alleles once again
A. is the law of independent assortment
B. statement B is law of segregation
Edward was found to be heterogeneous (Ss) for the sickle-cell trait. the alleles represented by the letters S and s are
on homologous chromosome
whether an allele is dominant or recessive depends on
whether it or another allele determines the phenotype when both are present
two fruit files with eyes of the usual red color are crosses, and their offspring are as follows: 77 red-eyed males, 71 ruby-eyed males, 152 red-eyed females. the gene that controls whether eyes are red or ruby is _______ and the allele for ruby is _______
sex-linked, recessive
all the off spring of the white hen and a black rooster are gray. the simplest explanation for this patter of inheritance is
incomplete dominance
a man who has B blood and a woman who has A blood type could have children of which of the following phenotype?
A, B, AB, or O
Duchenne muscular dystrophy is sex-linked recessive disorder characterized by a progressive loss of muscle tissue. neither Ruby not Carla has Duchenne muscular dystrophy, but their first son does have it. if the couple has a second child, what is the probability that he or she will also have this disease?
1/4 (1/2 chances the child will be male times 1/2 chance that he will inherit the X carrying the disease allele)
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