sarily the same alleles of those genes sister chromatids lleles at a ene locus GG Replication RR S S S mologous romosomes ve alleles for me genes at t T ecific loci. b. Sister chromatids of duplicated chromosomes have same alleles for each gene. T T

Human Anatomy & Physiology (11th Edition)
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The image shows a homologous pair of chromosomes.  Now imagine a crossing over event occurring between a chromatid on one chromosome and a chromatid on the other chromosome.  This cross over occurs between the S and T loci.  What are the genotypes of the two chromatids after the crossover?

ANSWER CHOICES

A. grsT and GRSt
B. impossible to know
C. grst and GRST
D. GrSt and gRsT
3.2.5 Homologous chromosomes carry the same sequence of genes but not
necessarily the same alleles of those genes
sister chromatids
alleles at a
Gg
G G
gene locus
Replication
Rr
RR
S
S S
a. Homologous
chromosomes
b. Sister chromatids
of duplicated
chromosomes
have same alleles
for each gene.
have alleles for
same genes at t T
specific loci.
TT
Transcribed Image Text:3.2.5 Homologous chromosomes carry the same sequence of genes but not necessarily the same alleles of those genes sister chromatids alleles at a Gg G G gene locus Replication Rr RR S S S a. Homologous chromosomes b. Sister chromatids of duplicated chromosomes have same alleles for each gene. have alleles for same genes at t T specific loci. TT
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