-
The garden pea has flowers that close tightly to promote cross-fertilization.
-
The garden pea has flowers that close tightly to prevent cross-fertilization.
-
The garden pea does not mature in one season and is a perennial plant.
-
Male and female reproductive parts attain maturity at different times, promoting self-fertilization.
-
First cross is performed by transferring the pollen of a heterozygous tall plant to the stigma of a true breeding dwarf plant. Second cross is performed by transferring the pollen of a heterozygous dwarf plant to the stigma of a true breeding tall plant.
-
First cross is performed by transferring the pollen of a true breeding tall plant to the stigma of a true breeding dwarf plant. Second cross is performed by transferring the pollen of a true breeding dwarf plant to the stigma of a true breeding tall plant.
-
First cross is performed by transferring the pollen of a true breeding tall plant to the stigma of a heterozygous dwarf plant. Second cross is performed by transferring the pollen of a heterozygous dwarf plant to the stigma of a true breeding tall plant.
-
First cross is performed by transferring the pollen of a heterozygous tall plant to the stigma of a heterozygous dwarf plant. Second cross is performed by transferring the pollen of a heterozygous tall plant to the stigma of a heterozygous dwarf plant.
-
F1: All AA-axial; F2: AA-Axial and aa-terminal.
-
F1: All aa-terminal; F2: AA-Axial and Aa-terminal.
-
F1: AA-axial and AAa-terminal; F2: All AA-axial.
-
F1: All Aa-axial; F2: AA-Axial, Aa-Axial, and aa-terminal.
-
1 tall : 1 dwarf
-
1 tall : 2 dwarf
-
3 tall : 1 dwarf
-
1 dwarf : 4 tall
-
Yes, males can be the carriers of red-green color blindness, as color blindness is autosomal dominant.
-
No, males cannot be the carriers of red-green color blindness, as color blindness is X-linked.
-
No, males cannot be the carriers of red-green color blindness, as color blindness is Y-linked.
-
Yes, males can be the carriers of red-green color blindness, as color blindness is autosomal recessive.
-
Possible genotypes are AABBcc, AaBbCc, AaBbcc, and the ratio is 1 : 2 : 1.
-
Possible genotypes are AABbcc, AaBbCc, AaBbcc, and the ratio is 1 : 3 : 1 .
-
Possible genotypes are AABbCc, AABbcc, AaBbCc, AaBbcc, and the ratio is 1 : 1 : 1 : 1 .
-
Possible genotypes are AABbcc, AaBbCC, AaBbcc, and the ratio is 1 : 1 : 1 .
-
The chromosomes randomly align during anaphase I at the equator. Separation of bivalent chromosomes occur during metaphase I of meiosis I. Similarly, separation of sister chromatids occurs at metaphase II of meiosis II. At the end of meiosis II, four different gametic combinations are produced, each containing a haploid set of chromosomes.
-
The chromosomes randomly align during metaphase I at the equator, and separation of homologous chromosomes occurs during anaphase I. Similarly separation of sister chromatids occurs at anaphase II of meiosis II. At the end of meiosis II, four different gametic combinations are produced, each containing a haploid set of chromosomes.
-
The chromosomes randomly align during prophase I at the equator, and separation of sister chromatids occurs during metaphase I of meiosis I. Similarly separation of bivalent chromosomes occur at metaphase II of meiosis II. At the end of meiosis II, four different gametic combinations are produced, each containing a diploid set of chromosomes.
-
The chromosomes randomly align during prophase I at the equator, and separation of bivalent chromosomes occur during anaphase I of meiosis I. Similarly, separation of homologous chromosomes occurs at metaphase II of meiosis II. At the end of meiosis II, four different gametic combinations are produced, each containing a diploid set of chromosomes.
Inheritance of fruit color in summer squash provides an example of the phenomenon of epistasis. Yellow fruit is produced by a cross involving the homozygous recessive expression of the W gene (ww]) and either the homozygous dominant (YY) or heterozygous (Yy) form of the Y) gene. The wwyy outcome is green fruit. White fruit arises whenever a dominant copy of the W gene is involved in the cross, regardless of the Y alleles present.
A cross of white WwYy heterozygotes produces the phenotypic ratio of 12 white : 3 yellow : 1 green fruits. Determine the best explanation for how these outcomes occur.
-
12 offspring are white because the W gene is epistatic to the Y gene. Three offspring are yellow, because w is not epistatic. Green offspring are obtained when the recessive form of both genes (wwyy) are present.
-
12 offspring are white becasue W gene is hypostatic to Y gene. Three offspring are yellow because Y is epistatic to w. Green offspring are obtained when the dominant form of both the genes (WWYY) is present.
-
12 offspring are white because W gene is dominant. Three offspring are yellow because Y is dominant and w is recessive. Green offspring are obtained when the recessive form of both the genes (wwyy) is present, showing codominance.
-
12 offspring are white because W is epistatic to Y gene. Three offspring are yellow because Y is hypostatic to w. Green offspring are obtained when the recessive alleles of both genes (wwyy) are present, showing recessive epistasis.