Which statement describes a similarity between the diploid and haploid phases of plant life? A zygote is formed ____. Human skin color is an example of ____, while sickle-cell anemia is an example of ____.both are multicellular Solution 1. both are multicellular. The plant life cycle alternates between haploid and diploid generations.Plants have multicellular haploid and multicellular diploid stages in their life cycle.Gametes develop in the multicellular haploid gametophyte.Fertilization gives rise to a multicellular diploid sporophyte,which produces haploid spores via meiosis. 2.Zygote is formed by the fusion of egg and sperm nuclei. In human fertilization,ovum which is a haploid secondary oocyte and a haploid sperm cell combine to form a single 2n diploid cell called the zygote. In fungi,the sexual fusion of haploid cells is called karyogamy.This cell may then enter meiosis or mitosis depending on the life cycle of the species. In plants,the zygote may be polyploid if fertilization occurs between meiotically unreduced gametes. Somatic cells are other than reproductive cells.Zygote formation occurs in reproductive cells. 3.Human skin color is an example of polygenic inheritance, while sickle-cell anemia is an example of pleiotropy. Polygenic inheritance occurs when one characteristic is controlled by two or more genes.Skin color is largely determined by the amount of melanin. Dark skinned individuals produce more melanin than light skinned individuals.At least three genes regulate the amount of melanin produced. Each gene has two forms: dark skin allele (A,B,and C) and light skin allele (a,b,and c). Pleiotropy occurs when variation at a single gene locus affects multiple aspects of the phenotype.Sickle cell anemia is a genetic disease that causes deformed red blood cells with a rigid,crescent shape instead of the normal flexible,round shape.It is caused by a change in one nucleotide in the HBB gene.Sickle cell anemia occurs when the HBB gene mutation causes both beta-globin subunits of hemoglobin to change into hemoglobin S..

1. Which statement describes a similarity between the diploid and haploid phases of plant life?
A zygote is formed ____.
Human skin color is an example of ____, while sickle-cell anemia is an example of ____.both
are multicellular
Solution
1. both are multicellular.
The plant life cycle alternates between haploid and diploid generations.Plants have multicellular
haploid and multicellular diploid stages in their life cycle.Gametes develop in the multicellular
haploid gametophyte.Fertilization gives rise to a multicellular diploid sporophyte,which
produces haploid spores via meiosis.
2.Zygote is formed by the fusion of egg and sperm nuclei.
In human fertilization,ovum which is a haploid secondary oocyte and a haploid sperm cell
combine to form a single 2n diploid cell called the zygote.
In fungi,the sexual fusion of haploid cells is called karyogamy.This cell may then enter meiosis
or mitosis depending on the life cycle of the species.
In plants,the zygote may be polyploid if fertilization occurs between meiotically unreduced
gametes.
Somatic cells are other than reproductive cells.Zygote formation occurs in reproductive cells.
3.Human skin color is an example of polygenic inheritance, while sickle-cell anemia is an
example of pleiotropy.
Polygenic inheritance occurs when one characteristic is controlled by two or more genes.Skin
color is largely determined by the amount of melanin. Dark skinned individuals produce more
melanin than light skinned individuals.At least three genes regulate the amount of melanin
produced. Each gene has two forms: dark skin allele (A,B,and C) and light skin allele (a,b,and c).
Pleiotropy occurs when variation at a single gene locus affects multiple aspects of the
phenotype.Sickle cell anemia is a genetic disease that causes deformed red blood cells with a
rigid,crescent shape instead of the normal flexible,round shape.It is caused by a change in one
nucleotide in the HBB gene.Sickle cell anemia occurs when the HBB gene mutation causes both
beta-globin subunits of hemoglobin to change into hemoglobin S.