Part 2: crossing beak color and feather color cross beak color and feather color. cross one parent that is heterozygous for both beak color and feather color with a parent that is homozygous for both recessive traits. what are the genotypes of the parents? (hint: recall that the p generation includes a heterozygous parent with dominant traits and a homozygous parent with recessive traits.)

The genotype of the heterozygous parent= BbFf

The genotype of the homozygous recessive parent= bbff

Explanation:

Let's assume that the allele "B" gives the dominant beak color while the allele "b" gives the recessive beak color. Likewise, the allele "F" imparts the dominant color to the feathers while the allele "f" gives the recessive color to the feathers. A parent heterozygous for beak color and feather color would have one copy of each dominant and recessive alleles for both the genes. On the other hand, the homozygous recessive parent would have two copies of the recessive alleles for the mentioned genes.  

According to the given information, the one parent is heterozygous for both beak color and feather color and the other parent is homozygous for both recessive traits.

The genotype of the parent that is heterozygous for both beak color and feather color= BbFf

The genotype of the parent that is homozygous for both recessive traits= bbff

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.