1. If one parent is homozygous dom Tor 11 the genotype i other parent is homozygous recessive for the same trait, that parent's genotype would be gg. a. What are the possible genotypes of their offspring? b. How many different phenotypes might we possibly see in their offspring?

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Chapter1: The Human Body: An Orientation
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1. If one parent is homozygous dominant for a trait, that parent's genotype might be GG. If the
other parent is homozygous recessive for the same trait, that parent's genotype would be gg.
What are the possible genotypes of their offspring?
b. How many different phenotypes might we possibly see in their offspring?
2. If a male is homozygous dominant for a trait, that parent's genotype might be DD. If the female
is heterozygous for the same trait, her genotype would be Dd.
a. How many genetically different sperm can the male produce?
b. Using a Punnett square, determine the expected genotypic ratios of their offspring.
What are the expected phenotypic ratios?
3. In garden peas, the gene for red flowers (R) is dominant over the gene for white flowers (r). If
pollen (cells containing sperm nuclei) from the anther (male reproductive organ) of a
homozygous red-flowered plant is added to the pistil (female reproductive organ containing the
egg) of a white- flowered plant:
a.
c.
What would be the expected phenotypic and genotypic ratios in the first generation of
offspring?
b. If two members of the first generation of offspring were crossed, what would be the expected
a.
Transcribed Image Text:1. If one parent is homozygous dominant for a trait, that parent's genotype might be GG. If the other parent is homozygous recessive for the same trait, that parent's genotype would be gg. What are the possible genotypes of their offspring? b. How many different phenotypes might we possibly see in their offspring? 2. If a male is homozygous dominant for a trait, that parent's genotype might be DD. If the female is heterozygous for the same trait, her genotype would be Dd. a. How many genetically different sperm can the male produce? b. Using a Punnett square, determine the expected genotypic ratios of their offspring. What are the expected phenotypic ratios? 3. In garden peas, the gene for red flowers (R) is dominant over the gene for white flowers (r). If pollen (cells containing sperm nuclei) from the anther (male reproductive organ) of a homozygous red-flowered plant is added to the pistil (female reproductive organ containing the egg) of a white- flowered plant: a. c. What would be the expected phenotypic and genotypic ratios in the first generation of offspring? b. If two members of the first generation of offspring were crossed, what would be the expected a.
What are the expected phenotypic ratios?
3. In garden peas, the gene for red flowers (R) is dominant over the gene for white flowers (r). If
pollen (cells containing sperm nuclei) from the anther (male reproductive organ) of a
homozygous red-flowered plant is added to the pistil (female reproductive organ containing the
egg) of a white-flowered plant:
C.
4.
a. What would be the expected phenotypic and genotypic ratios in the first generation of
offspring?
b. If two members of the first generation of offspring were crossed, what would be the expected
phenotypic and genotypic ratios in the next generation?
White fruit color in squash is due to a dominant allele. Yellow fruit occurs in plants which are
homozygous for the recessive allele. If pollen from the anthers of a heterozygous white-fruited
plant is placed on the pistil of the yellow-fruited plant; show, using ratios, the genotypes and
phenotypes you would expect the seeds from this cross to produce.
5. In man, the allele for normal color (A) is dominant to the allele for albinism (a). A normal man
whose father was albino married a normal woman whose mother was albino.
What are the chances that their first child will be albino?
b. What are the chances that their second child will be albino?
6.
If an albino woman married a normal man, one of whose parents was albino. what would be
the chances of their first child being albino?
a.
I
Transcribed Image Text:What are the expected phenotypic ratios? 3. In garden peas, the gene for red flowers (R) is dominant over the gene for white flowers (r). If pollen (cells containing sperm nuclei) from the anther (male reproductive organ) of a homozygous red-flowered plant is added to the pistil (female reproductive organ containing the egg) of a white-flowered plant: C. 4. a. What would be the expected phenotypic and genotypic ratios in the first generation of offspring? b. If two members of the first generation of offspring were crossed, what would be the expected phenotypic and genotypic ratios in the next generation? White fruit color in squash is due to a dominant allele. Yellow fruit occurs in plants which are homozygous for the recessive allele. If pollen from the anthers of a heterozygous white-fruited plant is placed on the pistil of the yellow-fruited plant; show, using ratios, the genotypes and phenotypes you would expect the seeds from this cross to produce. 5. In man, the allele for normal color (A) is dominant to the allele for albinism (a). A normal man whose father was albino married a normal woman whose mother was albino. What are the chances that their first child will be albino? b. What are the chances that their second child will be albino? 6. If an albino woman married a normal man, one of whose parents was albino. what would be the chances of their first child being albino? a. I
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