Choose the best explanation of codominance. a. genes are blended during homologous recombination. b. in a heterozygote, both alleles are expressed. c. in a heterozygote, both alleles combine to form an intermediate phenotype. d. a heterozygote is considered a carrier for the recessive allele.

The exact explanation for co dominance is that in a heterozygote, both alleles are expressed.

Option B

Explanation:

Mendel drafted certain terminologies in the history of genetics such as dominance and recessive traits. But later after Mendel, certain scientists found out some exceptions for this concept such as codominance, incomplete dominance and linkage.

Among this codominance is a trait in which for a heterozygote individual has both the characters expressed for example when a red flower and a white flower are mixed, the resulting flower is pink in color.

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the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.