Incomplete Dominance in Genetics
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Questions and Answers

What is the result of a cross between a homozygous dominant curly hair allele and a homozygous recessive straight hair allele?

  • Wiry hair
  • Both curly and straight hair (correct)
  • Curly hair
  • Straight hair

What is the genotype of a pink flower in a cross between a red flower and a white flower?

  • RW (correct)
  • WW
  • RR
  • WR

What is the blood type of a man's father if the man has type O blood and his mother has type B blood?

  • A (correct)
  • O
  • B
  • AB

What is the key difference between incomplete dominance and codominance?

<p>Incomplete dominance produces a mixture of parental phenotypes, while codominance produces a new phenotype. (A)</p> Signup and view all the answers

What law of Mendel's is demonstrated by the random alignment of homologous chromosomes during metaphase I?

<p>Law of Independent Assortment (A)</p> Signup and view all the answers

What is the number of alleles involved in a dihybrid cross?

<p>4 (C)</p> Signup and view all the answers

In a dihybrid cross involving round and yellow peas, what is the probability of obtaining a homozygous recessive genotype for both traits in the F1 offspring?

<p>12.5% (A)</p> Signup and view all the answers

In a Punnett square, what is the purpose of determining the probability of each gamete?

<p>To determine the probability of the offspring's genotype (C)</p> Signup and view all the answers

What is the ratio of round yellow to wrinkled green peas in the offspring of a dihybrid cross RrYy x RrYy?

<p>1:1:1:1 (B)</p> Signup and view all the answers

In a dihybrid cross, what is the probability of an offspring having yellow and wrinkled seeds?

<p>25% (A)</p> Signup and view all the answers

What is the genotype of an offspring with round yellow peas in a dihybrid cross RrYy x RrYy?

<p>RrYY or RRyy (A)</p> Signup and view all the answers

What is the genotype of a male fruit fly that expresses the recessive phenotype of white eyes?

<p>XW (A)</p> Signup and view all the answers

What is the purpose of creating a Punnett square in a dihybrid cross?

<p>To determine the probability of the offspring's genotype (C)</p> Signup and view all the answers

In a dihybrid cross, what is the expected ratio of offspring with a particular combination of traits?

<p>9:3:3:1 (D)</p> Signup and view all the answers

Which term describes the sex that produces gametes with different types of sex chromosomes?

<p>Heterogametic (C)</p> Signup and view all the answers

What is the purpose of reciprocal crosses in genetics?

<p>To compare the inheritance patterns of different traits (C)</p> Signup and view all the answers

What is the significance of Thomas Hunt Morgan's discovery of the recessive allele on the X chromosome?

<p>It showed that genes are passed on through chromosomes (C)</p> Signup and view all the answers

In a Punnett square, what is the probability of an offspring inheriting a particular combination of alleles?

<p>25% (B)</p> Signup and view all the answers

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