Imagine a pedigree that traces an inherited disorder found in individuals with two recessive alleles for gene D. The pedigree shows three siblings with the genotypes DD, Dd, and dd. Did the parents of these three children have the disorder? Explain.

Answers

Answer 1

Answer: No, the parents don't have a disorder, but they carry recessive allele.

Individuals with the disorder are recessive homozygous (dd). It is known that recessive allele produces its phenotype only when it is paired with another recessive allele. Thus, to have offspring with disorder (with genotype dd), parents must be heterozygous, or one parent is recessive homozygous, and the other one is heterozygous.

Now, let's imagine both situations:

Parents: Dd x dd
Offspring: Dd Dd dd dd

In this cross, there is no possibility to have children with genotype DD.

Parents: Dd x Dd
Offspring: DD Dd Dd dd

In this cross all three genotypes DD, Dd, or dd could be inherited.

It can be concluded that three children with the genotypes DD, Dd, and dd, the parents must be heterozygous which do not have the disorder.

Answer 2

Answer:

Answer:

the parents don't have a disorder, however, they carry recessive allele.

Related Questions

What is the major reason why fungus-like protists are not fungi?
Determine whether each statement describes mitosis, meiosis, or both mitosis and meiosis.occurs inorganisms thatsexually reproduceoccurs duringgrowth anddevelopmentthe DNA isreplicatedoccurs inall organismsthe number ofchromosomesremains the samethe number ofchromosomesreduces by half
Which process is responsible for the growth and repair of human tissue
The transfer of genes from one population to another
Which biomolecule does RNA and DNA belong to

Darwin was offered a position on the _________________ whose mission was to survey the waters around South America.

Answers

Darwin was offfered a position as a naturalist on the HMS Beagle, one of the Britsh Royal Navy's survey ship.

Help ASAP
What is the FUNCTION OF THE SETAE?

Answers

Answer:for filter feeding

Explanation:setae are used by filter feeders such as small crustaceans,baleen whales and marine prions.these organisms feed on suspended Feed in waters and so need a structure that allows them to extract the suspended particles from the water

Which type of evidence is least likely to result in changes to a phylogenetic tree?

Answers

Best source of data for defining phylogenetic relationships of in line of protists that occurs hundreds of millions of years ago is called DNA sequences for ribosomal RNA. Choose the tree that symbolize the fewest evolutionary changes, either in DNA sequence comparisons or morphological characters.

DNA sequencing is likely to result in changes to a phylogenetic tree.

Which of the following structures produces proteins in both eukaryotic andprokaryotic cells?
A. Nucleus
B. Cytoplasm
C. Mitochondrion
D. Ribosome

Answers

The answer is D. Ribosome

Answer:Cells need to make proteins. ... While a structure such as a nucleus is only found in eukaryotes, every cell needs ribosomes to manufacture proteins. Since there are no membrane-bound organelles in prokaryotes, the ribosomes float free in the cytosol. Ribosomes are found in many places around a eukaryotic cell.

Explanation:

Early as the 9th century, it was suggested when organisms change, they may be better able to ____________.reproduce
find a home
adapt to survive

Answers

Reproduce is the answer

Describe how a volcano is formed at a Continental Rift. Be sure to include, in your description, what is occurring at the plate boundary.

Answers

Simply, the stuff that makes up the Earth's mantle is rising at where two plates make a boundary, and when all that stuff reaches the top, it forms a volcano, and more of that stuff continues to push up, making the volcano taller and taller.

Other Questions

a volume of helium occupies 11.0 L at a pressure of 98.0 kpa. what is the new volume if the pressure drops to 86.2 kpa

Which layer of Earth is broken up into giant moving plates?Group of answer choicesCrustMantleOuter CoreInner CoreHELP

In pea plants, purple flowers are dominant over white flowers. Which of the following crosses would create an offspring population with all white flowers?two hybrid plants two homozygous recessive plants homozygous dominant plant with a hybrid plant homozygous recessive plant with a hybrid plant ------------------- Choose all the answers that apply. In some plants, pink flowers are dominant over yellow flowers. If Marlo crosses two hybrids _____. the ratio of pink to yellow flowers will be 3:1 50 percent of the offspring will be hybrids none of the offspring will have yellow flowers three-fourths of the offspring will have the same phenotype half of the offspring will be homozygous for flower color

What is the modern model of an atom