NEET Biology question
A homozygous sweet pea plant with blue flowers () and long pollen () is crossed with a homozygous plant having red flowers () and round pollen (). The resultant hybrid () is test-crossed with the double homozygous recessive (). Which of the following genotypes can never appear among the test-cross progeny?
Answer: (D)
Solution
Since the test-cross parent is fully homozygous recessive (), it can contribute only an allele at the flower-colour locus and only an allele at the pollen-shape locus to every offspring; consequently, no offspring of this cross can ever be homozygous dominant () at the
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