18 Questions
What is the result of a cross between a homozygous dominant curly hair allele and a homozygous recessive straight hair allele?
Both curly and straight hair
What is the genotype of a pink flower in a cross between a red flower and a white flower?
RW
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
What is the key difference between incomplete dominance and codominance?
Incomplete dominance produces a mixture of parental phenotypes, while codominance produces a new phenotype.
What law of Mendel's is demonstrated by the random alignment of homologous chromosomes during metaphase I?
Law of Independent Assortment
What is the number of alleles involved in a dihybrid cross?
4
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?
12.5%
In a Punnett square, what is the purpose of determining the probability of each gamete?
To determine the probability of the offspring's genotype
What is the ratio of round yellow to wrinkled green peas in the offspring of a dihybrid cross RrYy x RrYy?
1:1:1:1
In a dihybrid cross, what is the probability of an offspring having yellow and wrinkled seeds?
25%
What is the genotype of an offspring with round yellow peas in a dihybrid cross RrYy x RrYy?
RrYY or RRyy
What is the genotype of a male fruit fly that expresses the recessive phenotype of white eyes?
XW
What is the purpose of creating a Punnett square in a dihybrid cross?
To determine the probability of the offspring's genotype
In a dihybrid cross, what is the expected ratio of offspring with a particular combination of traits?
9:3:3:1
Which term describes the sex that produces gametes with different types of sex chromosomes?
Heterogametic
What is the purpose of reciprocal crosses in genetics?
To compare the inheritance patterns of different traits
What is the significance of Thomas Hunt Morgan's discovery of the recessive allele on the X chromosome?
It showed that genes are passed on through chromosomes
In a Punnett square, what is the probability of an offspring inheriting a particular combination of alleles?
25%
Explore the concept of incomplete dominance in genetics, where the effect of one allele is not completely masked by another. Learn about the role of heterozygotes and phenotypes in this phenomenon. Discover how it differs from the blending hypothesis and its significance in understanding genetic traits.
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