What is a test cross? Question 14 options: A cross of two pure-breeding forms to
ID: 200741 • Letter: W
Question
What is a test cross?
Question 14 options:
A cross of two pure-breeding forms to find out which form of a gene is dominant.
A cross between two unknown forms to determine their genotypes.
A cross between an offspring and its parent.
A cross of an F1 hybrid to an individual that is homologous recessive.
A cross of two pure-breeding forms to find out which form of a gene is dominant.
A cross between two unknown forms to determine their genotypes.
A cross between an offspring and its parent.
A cross of an F1 hybrid to an individual that is homologous recessive.
Explanation / Answer
Option 4 is the correct answer.
When the F1 hybrid offsping is crossed with an individual that is homozygous recessive for the particular trait, it is termed as test cross. It is a way to explore the genotpye of an organism. Test cross is used as an experimental mating test used to determine what alleles are present in the genotype. it can be used to identify whether an organism exhibiting a dominant trait is homozygous or heterozygous for a specific allele.
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