A(n)________ Later Develops into an Embryo

question 72

Multiple Choice

A(n) ________ later develops into an embryo.

• A)placenta
• B)ectoderm
• C)trophoblast
• D)blastocyst

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Definitions:

X Chromosome

One of the two types of sex chromosomes, found in both males and females, that carries genes responsible for the expression of many traits and conditions.

Recessive Trait

A genetic trait that is expressed in the phenotype only when two copies of the recessive allele are present, one from each parent.

Codominance

A genetic situation in which two alleles of a gene contribute to the phenotype of the organism in separate, distinctly observable ways.

Dominant Traits

Genetic characteristics that are expressed in an organism even when only one copy of the gene is present.