Chapter 1. Working a Dihybrid Cross

1.1 Problem Statement

In cucumbers, dull fruit (D) is dominant to glossy fruit (d), and orange fruit (R) is dominant to cream (r) fruit. The genes coding for dull and glossy assort independently from the genes coding for orange and cream. A plant that has dull and orange fruits is crossed to a plant that has dull and cream fruits. The cross produces 3⁄8 plants with dull and orange fruits, 3⁄8 plants with dull and cream fruits, 1⁄8 plants with glossy and orange fruits, and 1⁄8 plants with glossy and cream fruits. Give the genotypes of the parents and offspring of the cross.

Question

Generation Genotypes
P 9j7AuVvXg3ivc2vjSXe1ag== × gIBNsGJrWXh7r45cVOe9HA==
↓
F1 SA3ZlRfQMIpF3Hps0RyE1Kj58k/2sn4OPCK/QaRkvVPDLIAy38X4ww== QVaAmOeEgwWozc/fwHO75w==
SA3ZlRfQMIpF3Hps0RyE1Kj58k/2sn4OPCK/QaRkvVPDLIAy38X4ww== 0Ea8S69N9GGkVuc+dYnzrQ==
105MvCnUuqY/GMDSazpGJCkhiw9uKHbzVsMImvKNLJwv6Mde+GeMyA== M/63sUNyCpQIH5fnT8HCqA==
105MvCnUuqY/GMDSazpGJCkhiw9uKHbzVsMImvKNLJwv6Mde+GeMyA== tKGNiMNuLyWixfp1YfEbGQ==
2
Great job!
At least one of your answers is incorrect. Try again or click "I Need Help!" to go through the tutorial steps.
Incorrect.
false
{qq == true} done
{help} 1.2 OK. Let's go through the problem step by step. We'll start by reviewing what the problem is asking for.
{qq1 == "" || qq2 == "" || qq1.length > 5 || qq2.length > 5} 1.2 That's still not right. Let's go through the problem step by step. We'll start by reviewing what the problem is asking for.
{qq1.length < 4 || qq2.length < 4} 1.4 That's still not right. Let's go through the problem step by step. We'll start by reviewing genetic symbols and how independent assortment works.
{qq1 == true && qq2 == true} 1.6 That's still not right. Let's go through the problem step by step. We'll start by reviewing ratios and probabilities used in crosses.
{else} 1.5 That's still not right. Let's go through the problem step by step. We'll start by reviewing what we know about the parents and progeny.

1.2 Understand the problem and what you need to know

Question

What information is the problem asking you to provide? (check all that apply)

wCfH0QtRgXJ8o+c+ The phenotypes of the parents.
wCfH0QtRgXJ8o+c+ The phenotypic ratios of the progeny.
bI0LPa9lfHQ+dYqk The genotypes of parents and progeny.
wCfH0QtRgXJ8o+c+ Genotypic ratios of the progeny.
2
Correct.
Read the question carefully. After providing some information about the traits and genes that code for them, the problem asks you to provide some specific information.
Incorrect. The only thing the problem is asking you to explicitly provide is the genotypes of the parents and the progeny.

Question

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
3
Correct.
This question focuses on a genetic cross, which requires an understanding of the principles of heredity.
Incorrect.

Question

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
3
Correct.
The problem requires knowledge of the rules of heredity.
Incorrect.

1.3 Identify the phenotypes of parents and offspring

Question

Outline the phenotypes of the parents and offspring by choosing from the drop-down menus below.

Generation Phenotypes
P G8ptcFpX+mGBt6UXRfgOkJHc6/h7oA2kWnPjesg21DnCo/eQgN4YF7Nh8qiScpcAiln9AuxifHHlGK3qsfAThmpSSI1Xf1h+HfRqxCRPVI3X3hQVgfhVlKp87nStz2r7zN+tZ4tT+wd0INDp × KZtaelMiS0x6f6mO0YrDxK7LpcGaGr0jkM2hK3jB5lIkI4UVIm+o7e2l9Ffq7p3RpIGF/LzG1HLJgJnB3ABLRsafCUFp448H4alRcR8rzg3pYo6hoWsuOOCzrS0v21LGwMBfolsQgYMY2cfl
↓
F1 3⁄8 G8ptcFpX+mGBt6UXRfgOkJHc6/h7oA2kWnPjesg21DnCo/eQgN4YF7Nh8qiScpcAiln9AuxifHHlGK3qsfAThmpSSI1Xf1h+HfRqxCRPVI3X3hQVgfhVlKp87nStz2r7zN+tZ4tT+wd0INDp
3⁄8 KZtaelMiS0x6f6mO0YrDxK7LpcGaGr0jkM2hK3jB5lIkI4UVIm+o7e2l9Ffq7p3RpIGF/LzG1HLJgJnB3ABLRsafCUFp448H4alRcR8rzg3pYo6hoWsuOOCzrS0v21LGwMBfolsQgYMY2cfl
1⁄8 rpsrbvVUToVPMhvg8UcKqpH4xuwDqdMGoYeyluqKciPjQoynac6sELg1OxQSm2vaDaLAjB1vX7uNICBOwPhjMxWn7tK5L18pGLmI/EVCzq/ZcLPbCfkXdy4tXxxIH4bUGZ46/Gf8jlAtSSO2
1⁄8 5ZIWpbY97uEpTMg/OCn64SzkIj3iWm5VsSkMidMN5JCLrgPJel8TRotBc4upJ83hj4MCl5G816P8vZDPdhkazqu7RVJsNpjtYCTF7r82+6rAzpLYhuboSwinoxIojVvW/zDyXzdHPCesQpOI
3
Correct.
Read the problem. The information needed to select the phenotypes of parents and offspring of the cross is provided in the problem.
Incorrect.

1.4 Assigning symbols and the nature of dominance

Question

Give the allelic symbols to be used for each trait:

Texture
dull DD7UQIIkhDI=
glossy ujZVRF1sK00=
Color
orange k2tcaXUqHdo=
cream oUDghrXV/HA=
2
Correct.
Read the problem. The one-letter symbols used for each allele are given there.
Incorrect.

Question

In cucumbers:

  • The allele for glossy fruit is 8KGugLIUz2Yk3sM8U5a8g83aBXPlFjqG to the allele for dull fruit.
  • The allele for orange fruit is Uqb93Z9S5ReTtjbjV83YgJ8kQAMbmCl1 to cream fruit.
2
Correct.
Information about the dominance relationships of the genes coding for dull and glossy fruits is provided in the problem.
Incorrect.

Question

According to the problem, Genes for texture and color assort tXnTOn6YvSt+25kNY/r8uvPJkfviVPbL3dGSXH1gcQY=, meaning that they are located on sxVYmW9LnZscmfI85zFMEz0YvgdKyffg chromosome(s).

2
Correct. Genes located on different chromosomes assort independently.
Genes located close together on the same chromosome do not assort independently.
Incorrect. Genes located on different chromosomes assort independently.

1.5 Fill in what you know about the parental generation

Now determine what you know about the allelic symbols for the genotypes of the parents, using only what you know from the phenotypes given in the question (not the progeny) to guide you. Use an underscore (_) to indicate any genes you feel you can not ascertain from the phenotypes.

Question

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
3
Correct.
Some parts of the genotype can be determined from the phenotype alone. Dull fruit (D) is dominant to glossy fruit (d) and orange fruit (R) is dominant to cream fruit (r). Try again.
Incorrect.

Question

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
3
Correct.
Some parts of the genotype can be determined from the phenotype alone. Dull fruit (D) is dominant to glossy fruit (d) and orange fruit (R) is dominant to cream fruit (r). Try again.
Incorrect.

Question 1.1

Great. Now fill in the parental genotypes in the table below.

Generation Genotypes
P kNZiw76BruM/5Hg+yvTEyhKbLuU= × 0Ea8S69N9GGkVuc+dYnzrQ==
↓
F1 3⁄8 ??
3⁄8 ??
1⁄8 ??
1⁄8 ??
3
Correct.
Try again. You just determined these genotypes in the previous two multiple-choice questions!
Incorrect.

1.6 Fill in what you know about the progeny

Now determine what you know about the allelic symbols for the genotypes of the progeny. Use an underscore (_) to indicate any genes you can not ascertain from the phenotypes.

Question

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
3
Correct.
Dull fruit (D) is dominant to glossy fruit (d) and orange fruit (R) is dominant to cream fruit (r). Individuals that possess a recessive trait must carry two alleles for the recessive trait. Try again.
Incorrect.

Question 1.2

Now fill in the genotypes of all the progeny.

Generation Genotypes
P D_ R_ × D_ rr
↓
F1 3⁄8 kNZiw76BruM/5Hg+yvTEyhKbLuU=
3⁄8 0Ea8S69N9GGkVuc+dYnzrQ==
1⁄8 /limvIMO1ryQra6x1ZVo1Q==
1⁄8 tKGNiMNuLyWixfp1YfEbGQ==
3
Correct.
Remember that dull fruit (D) is dominant to glossy fruit (d) and orange fruit (R) is dominant to cream fruit (r). Individuals that possess a recessive trait must carry two alleles for the recessive trait. Use an underscore (_) for alleles you don't know.
Incorrect.

1.7 Separate the cross into two single-locus crosses: Texture

The next step in solving the problem is to separate the cross into two single-locus crosses, looking at the inheritance of each trait by itself. Let's start with the texture characteristic.

Question

First assemble the relevant information. In the table below fill in again what we know about the texture alleles for parents and progeny based solely on the information given directly in the question:

Generation Genotypes
P siZyXjF3/IwfAWZEKVDQPD79Qqk= × siZyXjF3/IwfAWZEKVDQPD79Qqk=
↓
F1 3⁄8 siZyXjF3/IwfAWZEKVDQPD79Qqk=
3⁄8 siZyXjF3/IwfAWZEKVDQPD79Qqk=
1⁄8 3TpmxSEeJfC4j8f6yqO+Ji/aDm8=
1⁄8 3TpmxSEeJfC4j8f6yqO+Ji/aDm8=
3
Correct.
You've already shown that you know this information. Review your work on past steps if necessary, then try again.
Incorrect. See correct answers above.

Question 1.3

What ratio of dull to glossy fruit is observed in the progeny?

k7cilDdhoOvWsbxbpmtDqyJwHFNbU2OH4ao5rXPcTVssGVo14rRA1A== dull (D_)
cQTh6dRw7F+gk3hA2vA33ocV7Rujv/2DQN1/QIvybX6wdmUPbPeYUQ== glossy (dd)
3
Correct.
Add up all the proportions that include dull fruits (3⁄8 + 3⁄8) and add up all the proportions that include glossy fruits.
Incorrect.

Question

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
3
Correct.
When progeny with a recessive trait are produced, both parents must carry a recessive allele. Try again.
Incorrect.

Question

kP97mXV3DI16tbhRf8QhHicF50WhQZfZVSF6or5ct/Nkzic50hx4fz1inUczBtzDbePqUwYBeSdwFb0suMjYjJPiOKGiKXYqUDzrSm9Y9vZkXzsFlc1KbTrD3xbV9X2QoRz76d/yUS13e/b66W91xKMTVTaypvaaC/08ilPQRbzbJQXbXpSoMM8nVlihanKkfywYd8nSiOA+agGlBh5/AfWgxzFv98EwRZvnjbF9OxBgT7iMjhiSWDvgEazR0dOOoAcd4kqZGd2GW0WrpV9X20huaZol+YS53vkUYZHqgEJFMTJurBNZ8FYJsCnI8fqbhr7yfaeVukDykPXOsNvrZNfeuVOAMvshC97LJlJIbXtBiFiGYPqiPZEaG+Relh424i7/IuWyvWyFaFjLAguif7eH3kzeWAfLje4iDhQvD1On1oYhOuqFZMItf8YOfMRE19ACF0pF41NAGxNbfnRHjsCq/W8utzkpwstc4Z2nJUY3x9S5z3ucTmyYfkuL2w+I0CicAya7Kqf9RKTShQxe31JEyfJ2WXW/UAzXXMvHA6QHO33ORwh9rOUzmDUdhyweEShBFcID3pThMZTfAP7rEz2Mbdl50BJC1I+shC5OYCxoM97xzCvjGFjJ01nsAH7+cHjn1LZLnrZ8T+ipHym6vC3VDKXecSPt5L/iu+pKA3Ec2sgbEmxqZNIbxYFMqVFAvfrJQuW8GxdG/wQdVFBhJvO6kvoG1Cm3xyr658xY3pmSI4fZfcC37Xw8VpdmM0b/cCamugrNNtHbn3sZDGg4xLRgvyZ/eXA1jvEuSUtvwE59WMOWVbcPbX1+I8v0USdpcWm84425xHdRAGx8F7Z4UVoK2gm2Wc1TxWCO6SPHfq8=
3
Correct.
If you can’t remember which genotypes and proportions are produced by a cross between two heterozygotes, draw a Punnett square. Try again.
Incorrect.

Question

In conclusion, then, we can conclude that the texture alleles for the two parents are eA9I1uaDoEhTML7qS5K/SQFWI8w= and eA9I1uaDoEhTML7qS5K/SQFWI8w=.

2
Correct.
Try again. You know this!
Incorrect.

1.8 Separate the cross into two single-locus crosses: Color

Now let's consider the color characteristic.

Question

First assemble the relevant information. In the table below fill in again what we know about the color alleles for parents and progeny based solely on the information given directly in the question:

Generation Genotypes
P dPOKVwJqZomUvueilue47njt4hg= × yHzo4/FwVQSds8+X7hP2s5TIwlE=
↓
F1 3⁄8 dPOKVwJqZomUvueilue47njt4hg=
3⁄8 yHzo4/FwVQSds8+X7hP2s5TIwlE=
1⁄8 dPOKVwJqZomUvueilue47njt4hg=
1⁄8 yHzo4/FwVQSds8+X7hP2s5TIwlE=
3
Correct.
You've already shown that you know this information. Review your work on past steps if necessary, then try again.
Incorrect. See correct answers above.

Question 1.4

What ratio of orange to cream fruit is observed in the progeny?

n3mV+x2Yz01eG/8kFcF6VaOj4Cz2WUA9KhSSko1Gk+3RgWDcvUYPPQ== orange (R_)
n3mV+x2Yz01eG/8kFcF6VaOj4Cz2WUA9KhSSko1Gk+3RgWDcvUYPPQ== cream (rr)
3
Correct.
Add up all the proportions that include orange fruits (3⁄8 + 1⁄8) and add up all the proportions that include cream fruits.
Incorrect.

Question

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
3
Correct.
A 1:1 ratio is produced by a cross between a heterozygote and a homozygote. Try again.
Incorrect.

Question

KeWEH2dxRwh6U6gK9N2+Jw0qxQeyliUaN/U64NclP8BF2ZTex26cQNHbEH9tjDeOGmFIb9E5QLUUC44O0J1S37Nazq1/CDHaYpm15EkolZgK1+KTJsviSYCoCeqyD/e1ApekWiGsFNt9BLRsN35x0kVkzqBhYwm8+XVwGF1pDx5hU1ewLimw9AzLFgm4SaON2AujF71hW9tKbtV9utzKhRkheYHkbw9EgUJBzfvfGjVneLAtoZTcnySIMzDKVG6SSQ7jIvSKYDc3LdP2rxp278Fr+XbGncf7oHWigTwE66v3A2JSkVmuC1Jkir9/+EdPLQwxAkKVcmg7EYDt37SNn2I1x++dGEW7CeTF6ukL9M4HErKp/EHQKRc3UrlC2/k5Z3i+86vLlTrgiDw9+AGfHWizgasqySkLLPQVgf6bHgnTna3/bU6VkXO2x9909D/Eaag7fjz4IFWta3fSPqiaWt+ypGE+UbuDEK2dcDT3VeVvaXrPpsKLWilnKPe4lnAvlkMa+V0JgEHJc+s9cVXxpNkX02faqEKUpSHKk8HBTKsnoaUoYPYZHd339MWcbAxrhINkKDOgTQiW+/pia5NEV0cYMWknbF5La4K/yNZfUfdC0zDFVR7j9Id+vWgA7D84vBgn5sndTKDzj018Sh12e/4ShfLAhfa5x9TnyDxRh9UN0ERUkvuQl8lX6OYBkRzuR5L6PVuP99xBA8rNmQ9crkrFxNShB0PtsBrL8TncclYPXe+/CDA01HVkEJ2VIcw+JJreEKVvICMBTquy3yJs1qt7fWS7oc8B7DQAbbBC0AcF0nPdwxAgTI5+Vqu66/jdgy9HhineupPdMb5UPJ9SjeB3ydlo/4hvu9G0aB7aF5DR9OIDTD5ZMMneB6qtsRklHDK5pFGaJoc=
3
Correct.
If you can’t remember which genotypes and proportions are produced by a cross between a heterozygote and a homozygote, draw a Punnett square. Try again.
Incorrect.

Question

In conclusion, then, we can conclude that the texture alleles for the two parents are 6ALDYAJg1pTYHlwLWLM2SZ7N1es= and yHzo4/FwVQSds8+X7hP2s5TIwlE=.

2
Correct.
Try again. You know this!
Incorrect.

1.9 Put It All Together

Now put it all together and try filling in the whole table again:

Question

Generation Genotypes
P 9j7AuVvXg3ivc2vjSXe1ag== × gIBNsGJrWXh7r45cVOe9HA==
↓
F1 SA3ZlRfQMIpF3Hps0RyE1Kj58k/2sn4OPCK/QaRkvVPDLIAy38X4ww== QVaAmOeEgwWozc/fwHO75w==
SA3ZlRfQMIpF3Hps0RyE1Kj58k/2sn4OPCK/QaRkvVPDLIAy38X4ww== 0Ea8S69N9GGkVuc+dYnzrQ==
105MvCnUuqY/GMDSazpGJCkhiw9uKHbzVsMImvKNLJwv6Mde+GeMyA== M/63sUNyCpQIH5fnT8HCqA==
105MvCnUuqY/GMDSazpGJCkhiw9uKHbzVsMImvKNLJwv6Mde+GeMyA== tKGNiMNuLyWixfp1YfEbGQ==
2
Great job!
At least one of your answers is incorrect. Try again.
Incorrect. Try reloading the tutorial and going through the individual steps again.