**Understanding Genetics: Complete Dominance in Leaf Phenotypes**Consider a plant that has the "Leaf" gene (L) which causes leaves to be either smooth or wrinkled and is inherited through complete dominance. Heterozygotes of the L gene are smooth.**A. What are the two alleles of the gene?**- The two alleles are "L" for smooth leaves and "l" for wrinkled leaves.**B. What is the recessive phenotype?**- The recessive phenotype is wrinkled leaves.**C. What is the genotype of a homozygous dominant individual?**- The genotype of a homozygous dominant individual is "LL".**D. What gametes can a heterozygous individual make?**- A heterozygous individual (Ll) can produce gametes with either the "L" or "l" allele.**E. Make a Punnett square to predict the percentage or fraction of recessive progeny when two heterozygous individuals are mated.**The Punnett square for the cross between two heterozygous individuals (Ll x Ll) would be as follows:``` L | l -----------------L | LL | Ll -----------------l | Ll | ll```- **Genotypes:** - 25% LL (Homozygous Dominant) - 50% Ll (Heterozygous) - 25% ll (Homozygous Recessive)- **Phenotypic Ratio:** - 75% Smooth Leaves (LL and Ll) - 25% Wrinkled Leaves (ll)Thus, the recessive progeny, with wrinkled leaves, make up 25% of the offspring.

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A dominant allele is an allele which show its effect both in the homozygous and heterozygous…

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Consider a plant that has the "Leaf" gene (L) that causes leaves to be either smooth or wrinkled and is inherited through complete dominance. Heterozygotes of the L gene are smooth. A. What are the two alleles of the gene? B. What is the recessive phenotype? C. What is the genotype of a homozygous dominant individual? D. What gametes can a heterozygous individual make? E. Make a Punnett square to predict the percentage or fraction of recessive progeny when two heterozygous individuals are mated.

Consider a plant that has the "Leaf" gene (L) that causes leaves to be either smooth or wrinkled and is inherited through complete dominance. Heterozygotes of the L gene are smooth. A. What are the two alleles of the gene? B. What is the recessive phenotype? C. What is the genotype of a homozygous dominant individual? D. What gametes can a heterozygous individual make? E. Make a Punnett square to predict the percentage or fraction of recessive progeny when two heterozygous individuals are mated.

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter3: Transmission Of Genes From Generation To Generation

Section: Chapter Questions

Problem 11QP: Crossing Pea Plants: Mendels Study of Single Traits Stem length in pea plants is controlled by a...

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Concept explainers

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.

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Question

**Understanding Genetics: Complete Dominance in Leaf Phenotypes**

Consider a plant that has the "Leaf" gene (L) which causes leaves to be either smooth or wrinkled and is inherited through complete dominance. Heterozygotes of the L gene are smooth.

**A. What are the two alleles of the gene?**

- The two alleles are "L" for smooth leaves and "l" for wrinkled leaves.

**B. What is the recessive phenotype?**

- The recessive phenotype is wrinkled leaves.

**C. What is the genotype of a homozygous dominant individual?**

- The genotype of a homozygous dominant individual is "LL".

**D. What gametes can a heterozygous individual make?**

- A heterozygous individual (Ll) can produce gametes with either the "L" or "l" allele.

**E. Make a Punnett square to predict the percentage or fraction of recessive progeny when two heterozygous individuals are mated.**

The Punnett square for the cross between two heterozygous individuals (Ll x Ll) would be as follows:

```
L | l
-----------------
L | LL | Ll
-----------------
l | Ll | ll
```

- **Genotypes:**
- 25% LL (Homozygous Dominant)
- 50% Ll (Heterozygous)
- 25% ll (Homozygous Recessive)

- **Phenotypic Ratio:**
- 75% Smooth Leaves (LL and Ll)
- 25% Wrinkled Leaves (ll)

Thus, the recessive progeny, with wrinkled leaves, make up 25% of the offspring.

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