Genetics Answers

Following a mutagenesis experiment to identify novel genes affecting the circadian clock in Drosophila melanogaster you discover several mutants. You start considering two of those mutants that you call c and d. The two homozygous c/c and d/d are arrhythmic (arrhythmic is the definition of their phenotype), whereas the two heterozygous C/c and D/d are rhythmic (rhythmic is the definition of their phenotype) with a 24h period. You make two true-breeding stocks: stock 3 homozygous for c and stock 4 homozygous for d. You cross them in both directions and in both cases you observe complementation with no difference between males and females. Then you take the progeny of one cross, for instance the F1 of Females 3 x Males 4, and you perform a Testcross. Out of 1000 flies resulting from the Testcross only 125 are rhythmic.

Which genotypes resulting from the testcross are Parental?

Following a mutagenesis experiment to identify novel genes affecting the circadian clock in Drosophila melanogaster you discover several mutants. You start considering two of those mutants that you call c and d. The two homozygous c/c and d/d are arrhythmic (arrhythmic is the definition of their phenotype), whereas the two heterozygous C/c and D/d are rhythmic (rhythmic is the definition of their phenotype) with a 24h period. You make two true-breeding stocks: stock 3 homozygous for c and stock 4 homozygous for d. You cross them in both directions and in both cases you observe complementation with no difference between males and females. Then you take the progeny of one cross, for instance the F1 of Females 3 x Males 4, and you perform a Testcross. Out of 1000 flies resulting from the Testcross only 125 are rhythmic.

Which are the genotypes of flies resulting from the testcross?

Following a mutagenesis experiment to identify novel genes affecting the circadian clock in Drosophila melanogaster you discover several mutants. You start considering two of those mutants that you call c and d. The two homozygous c/c and d/d are arrhythmic (arrhythmic is the definition of their phenotype), whereas the two heterozygous C/c and D/d are rhythmic (rhythmic is the definition of their phenotype) with a 24h period. You make two true-breeding stocks: stock 3 homozygous for c and stock 4 homozygous for d. You cross them in both directions and in both cases you observe complementation with no difference between males and females. Then you take the progeny of one cross, for instance the F1 of Females 3 x Males 4, and you perform a Testcross. Out of 1000 flies resulting from the Testcross only 125 are rhythmic.

What is the genotype of the F1 (progeny of Females 3 x Males 4). Select only one answer.

Following a mutagenesis experiment to identify novel genes affecting the circadian clock in Drosophila melanogaster you discover several mutants. You start considering two of those mutants that you call c and d. The two homozygous c/c and d/d are arrhythmic (arrhythmic is the definition of their phenotype), whereas the two heterozygous C/c and D/d are rhythmic (rhythmic is the definition of their phenotype) with a 24h period. You make two true-breeding stocks: stock 3 homozygous for c and stock 4 homozygous for d. You cross them in both directions and in both cases you observe complementation with no difference between males and females. Then you take the progeny of one cross, for instance the F1 of Females 3 x Males 4, and you perform a Testcross. Out of 1000 flies resulting from the Testcross only 125 are rhythmic.

What is the genotype of Females 3?

List of Traits

Cys-Tyr-Met-Cys-Asn= Straight hair

Cys-Tyr-Met-Leu-Asn= Curly hair

Cys-Asn-Gly-Thr-Phe= Red hair

Cys-Asn-Gly-Thr-His= Green hair

Thr-Pro-Arg-Ser-Phe-Phe= Tall

Thr-Pro-Arg-Tyr-Phe-Tyr= Short

Ala-Glu-Tyr= Big eyes

Ala-Glu-Leu= Small eyes

Ile-Leu-IIe-Cys-Trp= Long tail 

IIe-Leu-Cys-Trp-Thr= Short tail

Asn-Cys-Met-Leu-Cys= Brown skin

Asn-Cys-Met-IIe-Val= Yellow skin

Ser-Arg-Trp-Cys= Male

Ser-Pro-Leu-Cys= Female

DNA (leading strand):  5’ AGTCGTTGGTGT  3’

            DNA (lagging strand):   

            mRNA:  

            tRNA:  

            Amino acid sequence:  

            Trait:  

Make a family tree using data obtained in the survey of the woman. The proband (a woman) has one brother and two sisters, the eldest of whom has one son. The proband’s father had 3 sisters and one brother. The proband’s mother had 3 brothers, 2 of whom were monozygotic twins. Parents of the proband's father were cousins (the proband's great-grandfather (the grandfather’s father) was the brother of the proband’s great-grandmother. The proband’s grandmother (the mother’s mother) had a brother and a sister, who were twins.

What accounts for the behavior of alleles segregate them during gamete formation

How many different genotypes would occur in the offspring of a cross between a homozygous individual and a heterozygous individual?

1)what is meant by restriction enzymes/ restriction site in cloning?

2)How these restriction sites aids in cloning process

Jerry the mutant turtle has a chromosomes number of 2n=16. A cell from Jerry that is in Telophase I has:

a). 16 chromosomes

b). 8 chromosomes

c). 4 chromosomes

d). None of the above.

2n=16

n=16/2=8

a.?

is this correct? Please answer my question ASAP I am writing a test. Thanks!